Hots questions
Metals and non metals worksheet
1. A metal ‘X’ loses two electrons and a non-metal ‘Y’ gains one electron. Show the electron dot structure of compound formed between them. Is ionic or covalent? Does it have high melting point or low? Will it conduct electricity in solid state or in aqueous solution and why? Will it be soluble in water?
2. A student was given Mn, Zn, Fe and Cu metals. Identify which of them
(a) will not displace H2 from dil. HCl.
(b) will react only with steam to give H2(g).
(c) Will give H2 with 5% HNO3.
Write the chemical reactions involved.
3. Compound X and aluminium are used to join railway tracks.
(a) Identify the compound X.
(b) Name the reaction.
(c) Write down its reaction.
4. Samples of five metals ‘A’, ‘B’, ‘C’, ‘D’ and ‘E’ were taken and added to the following solution one by one. The results obtained have tabulated as follows.
Metal FeSO4 CuSO4 ZnSO4 AgNO3 Al2(SO4)3 MgSO4
A No reaction Displacement No reaction Displacement No reaction No reaction
B Displacement Displacement No reaction Displacement No reaction No reaction
C No reaction No reaction No reaction Displacement No reaction No reaction
D No reaction No reaction No reaction No reaction No reaction No reaction
E) Displacement Displacement Displacement Displacement No reaction No reaction
Use the above table to answer the following questions about the given metals.
(a) Which of them is most reactive and why?
(b) What would you observe if ‘B’ is added to CuSO4?
(c) Arrange ‘A’, ‘B’, ‘C’, ‘D’ and ‘E’ in the increasing order of reactivity.
(d) Container of which metal can store zinc sulphate and silver nitrate solution?
(e) Which of the above solution(s) can be stored in a container made of any of these metals and
why?
5. A metal A, which is used in thermite process, when heated with oxygen gives an oxide B, which is amphoteric in nature? Identify A and B. Write down the reactions of oxide B with HC1 and NaOH.
6. A non-metal A is an important constituent of our food and forms two oxides B and C. Oxide B is toxic whereas C causes global warming.
(a) Identify A, B and C.
(b) To which group of periodic table does A belong?
7. An element A reacts with water to form a compound B which is used in white washing. The compound B on heating forms an oxide which on treatment with water gives back B. Identify A, B and C and
give the reactions involved.
8. A non-metal A which is the largest constituent of air, when heated with H2 in 1 : 3 ratio in the presence of catalyst (Fe) gives a gas B. On heating with O2, it gives an oxide C. If this oxide is passed into water in the presence of air, it gives and acid D which act as a strong oxidising agent.
(a) Identify A, B, C and D.
(b) To which group of periodic table does this non-metal belong?
9. An element A burns with golden flame in air. It reacts with another element B, atomic number 17 to give a product C. An aqueous solution of product C on electrolysis gives a compound D and liberates hydrogen. Identify A, B, C and D. Also write down the equations for the reactions involved.
1. A metal ‘X’ loses two electrons and a non-metal ‘Y’ gains one electron. Show the electron dot structure of compound formed between them. Is ionic or covalent? Does it have high melting point or low? Will it conduct electricity in solid state or in aqueous solution and why? Will it be soluble in water?
2. A student was given Mn, Zn, Fe and Cu metals. Identify which of them
(a) will not displace H2 from dil. HCl.
(b) will react only with steam to give H2(g).
(c) Will give H2 with 5% HNO3.
Write the chemical reactions involved.
3. Compound X and aluminium are used to join railway tracks.
(a) Identify the compound X.
(b) Name the reaction.
(c) Write down its reaction.
4. Samples of five metals ‘A’, ‘B’, ‘C’, ‘D’ and ‘E’ were taken and added to the following solution one by one. The results obtained have tabulated as follows.
Metal FeSO4 CuSO4 ZnSO4 AgNO3 Al2(SO4)3 MgSO4
A No reaction Displacement No reaction Displacement No reaction No reaction
B Displacement Displacement No reaction Displacement No reaction No reaction
C No reaction No reaction No reaction Displacement No reaction No reaction
D No reaction No reaction No reaction No reaction No reaction No reaction
E) Displacement Displacement Displacement Displacement No reaction No reaction
Use the above table to answer the following questions about the given metals.
(a) Which of them is most reactive and why?
(b) What would you observe if ‘B’ is added to CuSO4?
(c) Arrange ‘A’, ‘B’, ‘C’, ‘D’ and ‘E’ in the increasing order of reactivity.
(d) Container of which metal can store zinc sulphate and silver nitrate solution?
(e) Which of the above solution(s) can be stored in a container made of any of these metals and
why?
5. A metal A, which is used in thermite process, when heated with oxygen gives an oxide B, which is amphoteric in nature? Identify A and B. Write down the reactions of oxide B with HC1 and NaOH.
6. A non-metal A is an important constituent of our food and forms two oxides B and C. Oxide B is toxic whereas C causes global warming.
(a) Identify A, B and C.
(b) To which group of periodic table does A belong?
7. An element A reacts with water to form a compound B which is used in white washing. The compound B on heating forms an oxide which on treatment with water gives back B. Identify A, B and C and
give the reactions involved.
8. A non-metal A which is the largest constituent of air, when heated with H2 in 1 : 3 ratio in the presence of catalyst (Fe) gives a gas B. On heating with O2, it gives an oxide C. If this oxide is passed into water in the presence of air, it gives and acid D which act as a strong oxidising agent.
(a) Identify A, B, C and D.
(b) To which group of periodic table does this non-metal belong?
9. An element A burns with golden flame in air. It reacts with another element B, atomic number 17 to give a product C. An aqueous solution of product C on electrolysis gives a compound D and liberates hydrogen. Identify A, B, C and D. Also write down the equations for the reactions involved.
Next
Why does a metal not release H2 gas on reacting with dilute nitric acid?
Why is copper used to make hot water tanks whereas steel is not?
Why do the non-metals not displace hydrogen from dilute acids
Give an example of a metal which
(i) can be easily cut with a knife.
(ii) is a liquid at room temperature.
Name the following: (2012)
(a) A metal which is preserved in kerosene
(b) A lustrous coloured non metal
(c) A metal which can melt while kept on palm,
(d) A metal, which is a poor conductor of heat.
Define Amphoteric oxides? Give two examples of such oxides. (2012)
Give reason for the following: (2013)
(a) Sodium metal is kept immersed in kerosene.
(b) Blue colour of copper sulphate solution disappears when some aluminium powder is added in it.
thin zinc plate was kept in a glass container having CuSO2 solution. On examining it was found that the blue colour of the solution is getting lighter and lighter. After a few days when the zinc plate was taken out of the solution, a number of small holes were noticed in it. State the reason and write chemical equation of the reaction. (2014)
Question 5.
Reverse of the following chemical reaction is not possible:
Zn (s) + CuSO4 (aq) → ZnSO4 (aq) + Cu (s)
Justify this statement with reason.
List four important properties of aluminium which are responsible for its great demand in industry. (2015)
metal ‘M’ is found in nature as its carbonate. It is used in the galvanization of iron. Identify ‘M’ and name its ore. How will you convert this ore into free metal? (2015)
Write down important properties of ionic compounds. (2017 D)
State two ways for preventing rusting of iron articles. (2017 OD)
Answer:
reddish brown coloured metal, used in electrical wires, when powdered and heated strongly in an open china dish, its colour turns black. When hydrogen gas is passed over this back substance, it regains its original colour. Based on the above information answer the following questions:
(i) Name the metal and the black coloured substance formed.
(ii) Write balanced chemical equations for both the reactions. (2012)
) Why does calcium start floating when added to water? (2012)
(b) Most of the metals do not give hydrogen while reacting with nitric acid. Why?
(c) Write equation for the reaction of iron with steam. Name the compound of iron obtained.
Write balanced equation for the reaction of:
(i) Aluminium when heated in air. Write the name of the product.
(ii) Iron with steam. Name the product obtained.
(iii) Calcium with water. Why does calcium start floating in water? (2012
Define the term ‘metallurgy’, and fill appropriate terms in the blanks: (2013)
The four major steps involved in metallurgy are:
(i) ……of ore.
(ii) Conversion of ore into its ……..
(iii) Reduction of oxides of ores into …….
(iv) …….of metal.
Draw a flow diagram to show extraction of metals of medium reactivity from their sulphide ore.
(b) Difference between Roasting and Calcination.
State reason for the following:
(i) Lemon is used for restoring the shine of tarnished copper vessels.
(ii) A metal sulphide is converted into its oxide to extract the metal from the sulphide ore.
(iii) Copper wires are used in electrical connections.
Differentiate between the following with suitable examples: (2015)
(i) mineral and ore
(ii) corrosion and rancidity
(iii) malleability and ductility
You are given samples of three metals sodium, magnesium and copper. Suggest any two activities to arrange them in order of their decreasing reactivity. (2015)
Differentiate between metals and non-metals on the basis of their chemical properties. (2017 OD)
a) In the formation of compound between two atoms A and B, A loses two electrons and B gains one electron.
(i) What is the nature of bond between A and B?
(ii) Suggest the formula of the compound formed between A and B.
(b) On similar lines explain the formation of MgCl2 molecule.
(c) Common salt conducts electricity only in the molten state. Why?
(d) Why is melting point of NaCl high? (2012)
) Show the formation of magnesium chloride and sodium chloride by transfer of electrons. (2012)
(b) Identify the ions present in these compounds.
(c) Why do ionic compounds not conduct electricity in the solid state?
The metals extracted from their ores are not very pure. They contain impurities, which can be removed by the process of refining. Name the most widely used process of refining impure metals. Draw a diagram of the apparatus used for refining of copper metal and state:
(i) The name of the rods which are used as cathode and anode.
(ii) The electrolyte used during the process.
(iii) What happens to the pure metal when current passes through the electrolyte?
(iv) What happens to the soluble and insoluble impurities present in the impure copper? (2013
) Explain the steps for extraction of copper from its ore. Write the reaction involved. (2012)
(b) Draw a neat, labelled diagram for electrolytic refining of copper and explain the process.
Pure iron is soft and stretches easily when hot (2013)
(a) How does this property of iron change when:
(i) small amount of carbon is mixed with it?
(ii) nickel and chromium are mixed with it?
(b) Define an alloy. How is an alloy prepared?
(c) An alloy has low melting point and is therefore used for electrical fuse. Name the alloy and write its constituents.
) Define corrosion. (2014)
(b) What is corrosion of iron called?
(c) How will you recognise the corrosion of silver?
(d) Why corrosion of iron is a serious problem?
(e) How can we prevent corrosion?
Answer:
) Explain any two physical properties of ionic compounds giving reason.
(b) List any two metals found in free state in earth’s crust. Where are they located in activity series?
(c) Metals towards the top of the activity series can not be obtained from their compounds by reducing with carbon. Why? (2015)
Name a reducing agent that may be used to obtain manganese from manganese dioxide. (CBSE 2009)
non-metal X exists in two different forms Y and Z. Y is the hardest natural substance, whereas Z is a good conductor of electricity. Identify X, Y and Z. (CBSE 2011)
Why does calcium float on water?
Name a non-metal which is lustrous and a metal which is non-lustrous. (CBSE 2011)
Which gas is liberated when a metal reacts with an acid? How will you test the presence of this gas? (CBSE 2011)
Name the metal which reacts with a very dilute HNOs to evolve hydrogen gas. (CBSE 2011
From amongst the metals sodium, calcium, aluminium, copper and magnesium, name the metal
(i) which reacts with water only on boiling and
(ii) another which doesnot react even with stream. (CBSE 2008)
Answer:
(i) Magnesium reacts with water only on boiling
(ii) copper metal doesnot react even with stream
Question 2.
(a) Show the formation of Nacl from sodium and chlorine atoms by the transfer of electrons?
(b) why sodium chloride has a high melting point?
(c) Name the anode and cathode used in electrolytic refining of impure copper metal. (CBSE 2008)
) Show the formation of Na2O by the transfer of electrons between the combining atoms.
(b) Why are ionic compounds usually hared?
(c) How is it that ionic compounds in the solid state do not conduct electricity but they do so when in molton state (CBSE 2008)
On adding dilute HCl acid to copper oxide powder, the solution formed is blue-green. Predict the new compound formed which imparts a blue-green colour to the solution. (CBSE 2008
Copper chloride is blue-green in colour
a) What are amphoteric oxides? Choose the amphoteric oxides from amongst the following oxides?
Na2O, ZnO, Al2O3, CO2, H2O.
(b) Why is it that non-metals do not displace hydrogen from dilute acids? (AI 2008)
Answer:
(a) The oxides which are acidic as well as basic in nature are called amphoteric oxides. Al2O3 and ZnO are amphoteric oxides.
(b) Non-metals cannot lose electrons so that H+ ions from acids become hydrogen gas and can be displaced.
Name two metals which react violently with cold water. Write any three observations you would make when such a metal is dropped into water. How would you identify the gas evolved, if any during the reaction?
a) Name a metal for each case
(i) it does not react with cold as well as hot water but reacts with steam.
(ii) it does not react with any physical state of water.
(b) When calcium metal is added to water the gas evolved does not catch fire, on adding sodium metal to water catches fire. Why is it so? (AI 2008
Give reasons for the following:
(a) Gold and silver are used to make jewellery.
(b) Carbonate and sulphide ores are usually converted into oxides prior to reduction
during the process of extraction.
Give reasons for the following:
(a) Metals can be given different shapes according to our needs.
(b) Hydrogen is not evolved when a metal reacts with nitric acid.
a) Write electron dot diagram for chlorine (at no. 17) and calcium (at no. 20). Show the formation of calcium chloride by transfer of electrons.
(b) Identify the nature of above compound and explain three physical properties of such compound. (CBSE 2015)
) An ore on treatment with dilute hydrochloric acid produces brisk effervesces.
What type of ore is this? What steps will be required to obtain metal from the enriched ore.
(b) Copper coin is kept immersed in silver nitrate solution for some time. What change will take place in coin and colour of the solution? Write balanced chemical equation of the reaction involved. (CBSE 2014)
Question 22.
You are provided with magnesium ribbon and sulphur powder. Explain with the help of an activity that metal oxides are basic and non-metal oxides are acidic in nature. (CBSE 2014)
Write two differences between calcination and roasting.
metal (E) is stored under kerosene. When a small piece of it is left open in the air, it catches fire. When the product formed is dissolved in water, it turns red litmus to blue.
(i) Name the metal (E).
(ii) Write the chemical equation for the reaction when it is exposed to air and when the product is dissolved in water.
(iii) Explain the process by which the metal is obtained from its molten chloride. (CBSE
What are alloys? How are they made? Name the constituents and uses of brass, bronze and solder. (CBSE 2012)
) Write the electron dot structures of sodium, oxygen and magnesium.
(b) Show the formation of Na2O and MgO by transfer of electrons. Name the ions present in these compound.
(c) List three properties of ionic
Give reasons for the following:
(i) Silver and copper lose their shine when they are exposed to air. Name the substance formed on their surface in each case.
(ii) Tarnished copper vessels are cleaned with tamarind juice.
(iii) Aluminium is more reactive than iron, yet there is less corrosion of aluminium as compared to iron when both are exposed to air. (CBSE
Write the names and symbols of two most reactive metals. Explain by drawing electronic structure how any one of the two metals react with a halogen. State any four physical properties of the compound formed. (CBSE 2012)
How is the method of extraction of metals high up in the reactivity series different from that for metals in the middle? Why the same process cannot be applied for them? Explain giving equations, the extraction of sodium.
) Carbon cannot be used as reducing agent to obtain Mg from MgO. Why?
(b) How is sodium obtained from molten sodium chloride? Give equation of the reactions.
(c) How is copper obtained from its sulphide ore? Give equations of the reactions. (CBSE 2012)
) In the formation of compound between two atoms A and B, A loses two electrons and B gains one electron.
(i) What is the nature of bond between A and B?
(ii) Suggest the formula of the compound formed between A and B.
(b) On similar lines explain the formation of MgCl2 molecule.
(c) Common salt conducts electricity only in the molton state. why?
(d) Why is melting point of NaCl high? (CBSE 2012)
) Differentiate between roasting and calcination. Explain the two with the help of suitable chemical equations. How is zinc extracted from its ore?
(b) Name two metals that can be used to reduce metal oxides to metals.
) Write the chemical name of the coating that forms on silver and copper articles when these are left exposed to moist air.
(b) Explain what is galvanisation. What purpose is served by it?
(c) Define an alloy. How are alloys prepared? How do the properties of iron change when:
(i) small quantity of carbon,
(ii) nickel and chromium are mixed with it. (CBSE 2012)
The reaction of metal (X) with ferric oxide is highly exothermic. Metal (X) is obtained from its oxides by electrolytic reduction. Identify (X) and write its reaction with ferric oxide.
(b) Give reason to justify that aluminium oxide is an amphoteric oxide. Also, give another example of amphoteric oxide.
(c) Mention constituent metals present in bronze. (CBSE 2011)
) Explain with an example how the metal (X) which is low in reactivity series and metal (Y) which is high in the reactivity series are obtained from their compounds by reduction process.
(b) Write the electronic configuration of sodium and chlorine. Show the formation of sodium chloride from sodium and chlorine by the transfer of electrons.
(c) List any two observations when a highly reactive metal is dropped in water. (CBSE 2011)
With the help of a suitable example, explain how ionic compounds are formed. State any three general properties of ionic compounds. (CBSE 2011)
Question 7.
(a) Give two methods to prevent the rusting of iron.
(b) Name the ores of the following metals:
(i) mercury, and
(ii) zinc
(c) Explain with the help of a diagram, how copper metal can be refined? Label the
important arrangements in the experimental setup. (C
Question 6.
(a) How can the metals at the top of the reactivity series be extracted from their ores? Explain with an example.
(b) Name any one alloy made from
(i) a metal and a non-metal, and
(ii) two metals. (CBSE 2011)
Name the main ore of mercury. How is mercury obtained from its ore? Give balanced chemical equation.
(b) What is thermite reaction? How is it used to join the railway tracks or craked machine parts?
(c) Name the method used to extract metals of high reactivity. (CBSE 2011)
) Give an example of a metal which
(i) can be easily cut with a knife,
(ii) is a liquid at room temperature.
(b) Write chemical equation for the reaction when
(i) Steam acts on red hot iron.
(ii) Zinc is added to iron (II) sulphate solution.
(c) What are alloys?
(d) Why are food cans coated with tin and not zinc? (AI 2008C
Describe an activity to find out which metal is more reactive-iron or copper?
(b) Arrange the following metals in decreasing order of their reactivity.
Fe, Zn, Na, Cu, Ag
(c) Why do ionic compounds have high melting points?
(d) Show the formation of NaCl from Na and Cl atoms by the transfer of electrons. (AI 2008C)
) With a labelled diagram, describe an activity to show that metals are good conductors of electricity.
(b) Account for the following:
(i) Hydrogen gas is not evolved when a metal reacts with nitric acid.
(ii) For storing, sodium metal is kept immersed in kerosene.
(iii) The reaction of iron (III) oxide, Fe2O3 with aluminium is used to join cracked iron parts of machines. (Foreign
) State the electron-dot structures for calcium and sulphur.
(b) Show the formation of CaS by the transfer of electrons.
(c) Name the ions present in this compound CaS. Atomic number of Ca = 20, O = 16. (CBSE 2015)
What is cinnabar? How is metal extracted from cinnabar? Explain briefly. (CBSE 2015)
Mention the names of the metals for the following: (CBSE 2015)
(i) Two metals which are alloyed with iron to make stainless steel.
(ii) Two metals which are used to make jewellary.
Answer:
(i) Nickel and chromium.
(ii) Gold and platinum.
Write one example of each of
(i) a metal which is so soft that, it can be cut with knife and a non-metal which is the hardest sustance.
(ii) a metal and a non-metal which exist as liquid at room temperature.
1. Aluminium is used for making cooking uten¬sils. Which of the following properties of alu¬minium are responsible for the same?
(ii) Good electrical conductivity
(iii) Ductility
(iv) High melting point
(a) (i) and (ii)
(b) (i) and (iii)
(c) (ii) and (iii)
(d) (i) and (iv)
2. The most abundant metal in the earth’s crust is
(a) Iron
(b) Aluminium
(c) Calcium
(d) Sodium
3. The poorest conductor of heat among metals is
(a) Lead
(b) Mercury
(c) Calcium
(d) Sodium
4. Which property of metals is used for making bells and strings of musical instruments like Sitar and Violin?
(a) Sonorousness
(b) Malleability
(c) Ductility
(d) Conductivity
5. Al2O3 + 2NaOH → …… + H2O
(a) Al(OH)3
(b) Na2O
(c) NaAlO2
(d) AlNaO2
6. Which of the following is the correct arrange-ment of the given metals in ascending order of their reactivity?
Zinc, Iron, Magnesium, Sodium
(a) Zinc > Iron > Magnesium > Sodium
(b) Sodium > Magnesium > Iron > Zinc
(c) Sodium > Zinc > Magnesium > Iron
(d) Sodium > Magnesium > Zinc > Iron
7. Which of the following pairs will give dis-placement reactions?
(a) FeSO4 solution and Copper metal
(b) AgNO3 solution and Copper metal
(c) CuSO4 solution and Silver metal
(d) NaCl solution and Copper metal
8. Non-metals form covalent chlorides because
(a) they can give electrons to chlorine
(b) they can share electrons with chlorine
(c) they can give electrons to chlorine atoms to form chloride ions
(d) they cannot share electrons with chlorine atoms
9. Which of the following oxide(s) of iron would be obtained on prolonged reaction of iron with steam?
(a) FeO
(b) Fe2O3
(c) Fe3O4
(d) Fe2O3 and Fe2O4
10. Which of tire following are not ionic compounds?
(i) KCl
(ii) HCl
(iii) CCl4
(iv) NaCl
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (iii) and (iv)
(d) (i) and (iii)
11. The electronic configuration of three elements X, Y and Z are as follows:
X = 2, 4, Y = 2, 7, Z = 2,1 Which two elements will combine to form an ionic compound and write the correct formula,
(a) X2Y
(b) YZ
(c) XZ3</sub
(d) Y2Z
12. The highly reactive metals like Sodium, Potas-sium, Magnesium, etc. are extracted by the
(a) electrolysis of their molten chloride
(b) electrolysis of their molten oxides
(c) reduction by aluminium
(d) reduction by carbon
13. Which of the following non-metal is lustrous?
(a) Sulphur
(b) Oxygen
(c) Nitrogen
(d) Iodine
14. Example of an amphoteric oxide is:
(a) Na2O
(b) K2O
(C) Al2O3
(d) MgO
15. Which one among the following is an acidic oxide?
(a) Na2O
(b) CO
(c) CO2
(d) Al2O3
16. The atomic number of an element ‘X’ is 12. Which inert gas is nearest to X?
(a) He
(b) Ar
(c) Ne
(d) Kr
17, The process in which a carbonate ore is heated strongly in the absence of air to convert it into metal oxide is called
(a) Roasting
(b) Reduction
(c) Calcination
(d) Smelting
18. Oxides of moderately reactive metals like Zinc, Iron, Nickel, Tin, Copper etc. are reduced by using
(a) Aluminium as reducing agent
(b) Sodium as reducing agent
(c) Carbon as reducing agent
(d) Calcium as reducing agent
19. In thermite welding a mixture of …… and …… is ignited with a burning magnesium ribbon which produces molten iron metal as large amount of heat is evolved.
(a) iron (III) oxide and aluminium powder
(b) iron (II) oxide and aluminium powder
(c) iron (III) chloride and aluminium powder
(d) iron (III) sulphate and aluminium powder
20. Galvanisation is a method of protecting iron from rudftng by coating with a thin layer of
(a) Galium
(b) Aluminium
(c) Zinc
(d) Silver
21. An element X is soft and can be cut with a knife. This is very reactive to air and cannot be kept open in air. It reacts vigorously with water. Identify the element from the following
(a) Mg
(b) Na
(c) P
(d) Ca
22. Bonding between X and Y forms compound Z. X loses electron and Y gains electron. Which of the following properties is not shown by Z?
(a) Has high melting point
(b) Has low melting point
(c) Conducts electricity in molten state
(d) Occurs as solid
23. The electronic configurations of three ele¬ments X, Y and Z are X — 2, 8; Y — 2, 8, 7 and Z — 2, 8, 2. Which’of the following is correct?
(a) X is a metal
(b) Y is a metal
(c) Z is a non-metal
(d) Y is a non-metal and Z is a metal
24. Amalgam is an alloy of
(a) Copper and Tin
(b) Mercury
(c) Lead and Tin
(d) Copper and Zinc
25. Copper objects lose their shine and form green coating of
(a) Copper oxide
(b) Copper hydroxide and Copper oxide
(c) Basic Copper carbonate
(d) Copper nitrate
26. Elements can be classified as ……… and ……. .
27. Two examples of metals which are poor conductors of heat are ………, ……… .
28. Two metals which melt when kept on the palm are ………, ……… .
29.A non-metal which is a good conductor of electricity is ……… .
30. Metals can form positive ions by ……… .
31. A non-metal which is lustrous is ……… .
32. A metal which burns in air with a dazzling white flame is ……… .
33. Metals above hydrogen in the activity series can displace ……… from dilute acids.
34. The extraction of metals from their ores and then refining them for use is known as ……… .
35.. ……… is an allotroph of carbon and is the hardest natural substance.
36. Metals which are so soft that they can be cut with a knife are ………, ………
37. Metal oxides ……… and ……… dissolve in water to form alkalis.
38. The non-metal which is liquid at room temperature is:
a) Mercury
b) Bromine
c) Carbon
d) Helium
39. The number of protons in an atom of an element A is 19 then, the number of electron in its ion A+ is:
a) 18
b) 19
c) 20
d) 21
40.. Bauxite is an ore of
a) Iron
b) Aluminium
c) Mercury
d) Copper
41. The metal which is liquid at room temperature is
a) Bromine
b) Mercury
c) Iodine
d) Potassium
42. The sulphide ores are converted into oxides by heating strongly in the presence of excess air. This process is known as
a) Roasting
b) Smelting
c) Calcination
D. Refining
43.In electrolytic refining, the cathode is made up of
a) Pure metal
b) Impure metal
c) Alloy
d) Metallic
44. In the given reaction, Al2O3 + NaOH → ……X…… + H2O
What is element X?
a) NaAlO2
b) Na3Al
c) Na2O3
d) NaAlo3
45. Which of the following represent the correct order of decreasing reactivity?
a) Mg > Al > Zn > Fe
b) Mg > Zn > Al > Fe
c) Al > Zn > Fe > Mg
d) Mg > Fe > Zn > al
46. An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be
(a) Ca
(b) C
(c) Si
(d) Fe
47. Which of the following pairs will give displacement reactions?
(a) NaCl solution and copper metal
(b) MgCl2 solution and aluminium metal
(c) FeSO4 solution and silver metal
(d) AgNO3 solution and copper metal
48.. Which among the following is the most abundant metal found in the earth’s crust?
(a) Magnesium
(b) Aluminium
(c) Oxygen
(d) Iron
49. Which of the following pairs of reactants will go undergo a displacement reaction?
(a) CuSO4 + Fe
(b) ZnSO4 + Fe
(c) MgSO4 + Fe
(d) Ca(SO4)2 + Fe
50. Galvanisation is a method of protecting steel and iron from rusting by coating them with a thin layer of
(a) Copper
(b) Aluminum
(c) Zinc
(d) Bauxite
51. Which of the following alloys contains a non-metal as one of its constituents?
(a) Steel
(b) Brass
(c) Amalgam
D.bronze
52. An element X is soft and can be cut with the help of a knife. It is very reactive to air and cannot be kept open in the air. It reacts vigorously with water. Identify the element from the following:
(a) Mg
(b) Na
(c) P
(d) Ca
53. Which of the given properties is generally not shown by metals?
A. Electrical conduction
B. Sonorous in nature
C. Dullness
D. Ductility
54. The ability of metals to be drawn into thin wire is known as
A. Ductility
B. Malleability
C. Sonorousity
D. Conductivity
55 Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?
(a) Good thermal conductivity
(b) Good electrical conductivity
(c) Ductility
(d) High melting point
A. (A) & (B)
B. (A) & (C)
C. (B) & (C)
D. (A) & (D)
56. Which one of the given metals does not react with cold as well as hot water?
A. Na
B. Ca
C. Mg
D. Fe
57. Which of the given oxide(s) of iron would be obtained on prolonged reaction of iron with steam?
A. FeO
B. Fe₂O₃
C. Fe₃O₄
D. Fe₂O₃ and Fe₃O₄
58. What happens when calcium is treated with water?
(a) It does not react with water
(b) It reacts violently with water
(c) It reacts less violently with water
(d) Bubbles of hydrogen gas formed stick to the surface of calcium
A. (A) & (D)
B. (B) & (C)
C. (A) & (B)
D. (C) & (D)
59. Generally metals react with acids to give salt and hydrogen gas. Which of the given acids does not give hydrogen gas on reacting with metals (except Mn and Mg)?
A. H₂SO₄
B. HCl
C. HNO₃
D. All the these
60.The composition of aqua-regia is
A. Dil.HCl : Conc. HNO₃ = 3 : 1
B. Conc.HCl : Dil. HNO₃ = 3 : 1
C. Conc.HCl : Conc. HNO₃ = 3 : 1
D. Dil.HCl : Dil. HNO₃ = 3 : 1
61. Which of the following are not ionic compounds?
(a) KCl
(b) HCl
(c) CCl₄
(d) NaCl
A. (A) & (B)
B. (B) & (C)
C. (C) & (D)
D. (A) & (C)
62. Which one of the given properties is not generally exhibited by ionic compounds?
A. Solubility in water
B. Electrical conductivity in solid state
C. High melting and boiling points
D. Electrical conductivity in molten state
63 Which of the following metals exists in its native state in nature?
(a) Cu
(b) Au
(c) Zn
(d) Ag
A. (A) & (B)
B. (B) & (C)
C. (B) & (D)
D. (C) & (D)
64. Metals are refined by using different methods. Which of the following metals are refined by electrolytic refining?
(a) Au
(b) Cu
(c) Na
(d) K
A. (A) & (B)
B. (A) & (C)
C. (B) & (C)
D. (C) & (D)
65. Silver articles become black on prolonged exposure to air. This is due to the formation of
A. Ag₃N
B. Ag₂O
C. Ag₂S
D. Ag₂S and Ag₃N
66. Galvanisation is a method of protecting iron from rusting by coating with a thin layer of
A. Gallium
B. Aluminium
C. Zinc
D. Silver
67. Stainless steel is very useful material for our life. In stainless steel, iron is mixed with
A. Ni and Cr
B. Cu and Cr
C. Ni and Cu
D. Cu and Au
68. If copper is kept open in air, it slowly loses its shining brown surface and gains a green coating. It is due to the formation of
A. CuSO₄
B. CuCO₃
C. Cu(NO₃)₂
D. CuO
69. Generally, metals are solid in nature. Which one of the given metals is found in liquid state at room temperature?
A. Na
B. Fe
C. Cr
D. Hg
70. Which of the given metals are obtained by electrolysis of their chlorides in molten state ?
(a) Na
(b) Ca
(c) Fe
(d) Cu
A. (A) & (D)
B. (C) & (D)
C. (A) & (C)
D. (A) & (B)
71. Generally, non-metals are not lustrous. Which of the given nonmetals is lustrous?
A. Sulphur
B. Oxygen
C. Nitrogen
D. Iodine
72. Which one of the given four metals would be displaced from the solution of its salts by other three metals?
A. Mg
B. Ag
C. Zn
D. Cu
73. 2 ml each of concentrated HCl, HNO₃ and a mixture of concentrated HCl and concentrated HNO₃ in the ratio of 3 : 1 were taken in test tubes labelled as A, B and C. A small piece of metal was put in each test tube. No change occurred in test tubes A and B but the metal got dissolved in test tube C respectively. The metal could be
A. Al
B. Au
C. Cu
D. Pt
74. An alloy is
A. An element
B. A compound
C. A homogeneous mixture
D. A heterogeneous mixture
75. An electrolytic cell consists of
(a) Positively charged cathode
(b) Negatively charged anode
(c) Positively charged anode
(d) Negatively charged cathode
A. (A) & (B)
B. (C) & (D)
C. (A) & (C)
D. (B) & (D)
A. Ag₃N
B. Ag₂O
C. Ag₂S
D. Ag₂S and Ag₃N
66. Galvanisation is a method of protecting iron from rusting by coating with a thin layer of
A. Gallium
B. Aluminium
C. Zinc
D. Silver
67. Stainless steel is very useful material for our life. In stainless steel, iron is mixed with
A. Ni and Cr
B. Cu and Cr
C. Ni and Cu
D. Cu and Au
68. If copper is kept open in air, it slowly loses its shining brown surface and gains a green coating. It is due to the formation of
A. CuSO₄
B. CuCO₃
C. Cu(NO₃)₂
D. CuO
69. Generally, metals are solid in nature. Which one of the given metals is found in liquid state at room temperature?
A. Na
B. Fe
C. Cr
D. Hg
70. Which of the given metals are obtained by electrolysis of their chlorides in molten state ?
(a) Na
(b) Ca
(c) Fe
(d) Cu
A. (A) & (D)
B. (C) & (D)
C. (A) & (C)
D. (A) & (B)
71. Generally, non-metals are not lustrous. Which of the given nonmetals is lustrous?
A. Sulphur
B. Oxygen
C. Nitrogen
D. Iodine
72. Which one of the given four metals would be displaced from the solution of its salts by other three metals?
A. Mg
B. Ag
C. Zn
D. Cu
73. 2 ml each of concentrated HCl, HNO₃ and a mixture of concentrated HCl and concentrated HNO₃ in the ratio of 3 : 1 were taken in test tubes labelled as A, B and C. A small piece of metal was put in each test tube. No change occurred in test tubes A and B but the metal got dissolved in test tube C respectively. The metal could be
A. Al
B. Au
C. Cu
D. Pt
74. An alloy is
A. An element
B. A compound
C. A homogeneous mixture
D. A heterogeneous mixture
75. An electrolytic cell consists of
(a) Positively charged cathode
(b) Negatively charged anode
(c) Positively charged anode
(d) Negatively charged cathode
A. (A) & (B)
B. (C) & (D)
C. (A) & (C)
D. (B) & (D)
76. During electrolytic refining of zinc, it gets
A. Deposited on cathode
B. Deposited on anode
C. Deposited on cathode as well as anode
D. Remains in the solution
77. An element A is soft and can be cut with a knife. This is very reactive to air and cannot be kept open in air. It reacts vigorously with water. Identify the element
A. Mg
B. Na
C. P
D. Ca
78. Alloys are homogeneous mixtures of a metal with a metal or nonmetal. Which among the given alloys contain non-metal as one of its constituents?
A. Brass
B. Bronze
C. Amalgam
D. Steel
79. Which among the given statements is incorrect for magnesium metal?
A. It burns in oxygen with a dazzling white flame
B. It reacts with cold water to form magnesium oxide and evolves hydrogen gas
C. It reacts with hot water to form magnesium hydroxide and evolves hydrogen gas
D. It reacts with steam to form magnesium hydroxide and evolves hydrogen gas
80. Which among the given alloys contains mercury as one of its constituents?
A. Stainless steel
B. Alnico
C. Solder
D. Zinc amalgam
81. Reaction between X and Y, forms compound Z. X loses electron and Y gains electron. Which of the given properties is not shown by Z?
A. Has high melting point
B. Has low melting point
C. Conducts electricity in molten state
D. Occurs as solid
82 The electronic configurations of three elements X, Y and Z are X – 2, 8; Y – 2, 8, 7 and Z – 2, 8, 2. Which of the given is correct?
A. X is a metal
B. Y is a metal
C. Z is a non-metal
D. Y is a non-metal & Z is a metal
A. Deposited on cathode
B. Deposited on anode
C. Deposited on cathode as well as anode
D. Remains in the solution
77. An element A is soft and can be cut with a knife. This is very reactive to air and cannot be kept open in air. It reacts vigorously with water. Identify the element
A. Mg
B. Na
C. P
D. Ca
78. Alloys are homogeneous mixtures of a metal with a metal or nonmetal. Which among the given alloys contain non-metal as one of its constituents?
A. Brass
B. Bronze
C. Amalgam
D. Steel
79. Which among the given statements is incorrect for magnesium metal?
A. It burns in oxygen with a dazzling white flame
B. It reacts with cold water to form magnesium oxide and evolves hydrogen gas
C. It reacts with hot water to form magnesium hydroxide and evolves hydrogen gas
D. It reacts with steam to form magnesium hydroxide and evolves hydrogen gas
80. Which among the given alloys contains mercury as one of its constituents?
A. Stainless steel
B. Alnico
C. Solder
D. Zinc amalgam
81. Reaction between X and Y, forms compound Z. X loses electron and Y gains electron. Which of the given properties is not shown by Z?
A. Has high melting point
B. Has low melting point
C. Conducts electricity in molten state
D. Occurs as solid
82 The electronic configurations of three elements X, Y and Z are X – 2, 8; Y – 2, 8, 7 and Z – 2, 8, 2. Which of the given is correct?
A. X is a metal
B. Y is a metal
C. Z is a non-metal
D. Y is a non-metal & Z is a metal
83. Although metals form basic oxides, which of the given metals form an amphoteric oxide?
A. Na
B. Ca
C. Al
D. Cu
(a) Ag2O (b) Ag2S (c) AgCN (d) Ag2O and Ag2S
111. During smelting, an additional substance is added which combines with impurities to form a fusible product known as
(a) slag (b) mud (c) gangue (d) flux
112. A student placed an iron nail in copper sulphate solution. He observed the reddish brown coating on the iron nail which is
(a) soft and dull (
Question 155
In general, the number of electrons in the outermost shell of a metal atom is
(a) 1
(b) 1 to 3
(c) 5 to 8
(d) 8
Question 156
Aluminum is used for making cooking utensils. Which of the following properties of aluminum are responsible for the same?
(i)Good thermal conductivity
(ii)Good electrical conductivity
(iii) Ductility
(iv) High melting point
(a) (i) and (ii)
(b) (i) and (iii)
(c) (ii) and (iii)
(d) (i) and (iv)
Question 157
Two Statement are made
Statement A: Zinc is used in the galvanization of iron
Statement B: Its coating on Iron articles increasing the life of it by protecting it from rusting
(a)Statement A is correct only
(b) Statement A is correct only
(c) Both Statement A and B are correct
(d) Both Statement A and B are incorrect
Question 158
Hematite is an ore of
(a) iron
(b) aluminum
(c) copper
(d) tin
Question 159
Metals are refined by using different methods. Which of the following metals are refined by electrolytic refining?
(a) Au
(b) Cu
(c) Na
(d) K
Question 160
Copper sulphate solution can be easily kept in a container made of
(a)Lead
(b) Zinc
(c) Silver
(d) Aluminum
Question 161
Blue gold is an alloy of
(a)Gold and aluminum
(b) Gold and indium
(c) Gold and silver
(d) Gold and copper
Question 162
Which of the following is incorrect?
(a)Zinc Oxide is called as amphoteric oxide
(b) Silicon counts among metalloids
(c) Sodium is kept open in air
(d) Metals conduct electricity
Question 163
Which metal can be displaced by copper from its salt solution?
(a)Silver
(b) Zinc
(c) Iron
(d) sodium
Question 164
Which of the following oxide cannot be reduced with carbon to obtain the metal?
(a)MnO2
(b) Cr2O3
(c) Al2O3
(d)All the above
Question 165
Which is correct order as per the reactivity of the metals
(a) Zn > Fe > Cu > Ag
(b) Fe > Zn > Cu > Ag
(c) Cu > Zn > Fe > Ag
(d) Zn > Cu > Fe > Ag
Question 166
Although metals form basic oxides, which of the following metals form an amphoteric oxide?
(a) Al
(b) Ca
(c) Na
(d) Cu
Question 167
Which of the following non-metal is good conductor of electricity?
(a) Graphite
(b) Phosphorus
(c) Hydrogen
(d) Bromine
Question 168
Which among the following alloys contain mercury as one of its constituents?
(a) Stainless steel
(b) Alnico
(c) Solder
(d) Zinc amalgam
Question 169
Two statement are made
Statement A: The lustre of a metal is due to presence of free electrons
Statement B: Metals conducts heat
(a) Statement A is correct only
(b) Statement B is correct only
(c) Statement A and B both are correct
(d) Statement A and B both are incorrect
Question 171
Which of the following oxide(s) of iron would be obtained on prolonged reaction of iron with steam?
(a) FeO
(b) Fe2O3
(c) Fe3O4
(d) Fe2O3 and Fe3O
Question 172
Which of the following is true?
(a) Color of basic copper carbonate is green
(b) Malachite is an ore of Copper
(c) Aluminum is more reactive than Copper
(d) All the above
Question 173
The ability of metals to be drawn into thin wire is known as
(a) Ductility
(b) Malleability
(c) Sonority
(d) Conductivity
Question 174
What happens when calcium is treated with water?
(i) It does not react with water
(ii) It reacts violently with water
(iii) It reacts less violently with water
(iv) Bubbles of hydrogen gas formed stick to the surface of calcium
(a) (i) and (iv)
(b) (ii) and (iii)
(c) (i) and (ii)
(d) (iii) and (iv)
A. Na
B. Ca
C. Al
D. Cu
84. Generally, non-metals are not conductors of electricity. Which of the given is a good conductor of electricity?
A. Diamond
B. Graphite
C. Sulphur
D. Fullerene
85. Electrical wires have a coating of an insulating material. The material generally used is
A. Sulphur
B. Graphite
C. PVC
D. All can be used
86. Which of the given non-metals is a liquid?
A. Carbon
B. Bromine
C. Phosphors
D. Sulphur
87. Which of the given can undergo a chemical reaction?
A. MgSO₄ + Fe
B. ZnSO₄ + Fe
C. MgSO₄ + Pb
D. CuSO₄ + Fe
88. Which of the given metals is present in the anode mud during the electrolytic refining of copper?
A. Sodium
B. Aluminium
C. Gold
D. Iron
B. Graphite
C. Sulphur
D. Fullerene
85. Electrical wires have a coating of an insulating material. The material generally used is
A. Sulphur
B. Graphite
C. PVC
D. All can be used
86. Which of the given non-metals is a liquid?
A. Carbon
B. Bromine
C. Phosphors
D. Sulphur
87. Which of the given can undergo a chemical reaction?
A. MgSO₄ + Fe
B. ZnSO₄ + Fe
C. MgSO₄ + Pb
D. CuSO₄ + Fe
88. Which of the given metals is present in the anode mud during the electrolytic refining of copper?
A. Sodium
B. Aluminium
C. Gold
D. Iron
89. An element reacts with oxygen to give a compound with a high melting point. The compound is soluble in water. The element is likely to be
A. Calcium
B. Carbon
C. Iron
D. Silicon
90.. The second most abundant metal in the earth’s crust is
A. Oxygen
B. Silicon
C. Aluminium
D. Iron
91. An alloy of Zn and Cu is dissolved in dil. HCl. Hydrogen gas is evolved. In this evolution of gas
A. Only zinc reacts with dil. HCl
B. Only copper reacts with dil. HCl
C. Both zinc and copper react with dil. HCl
D. Only copper reacts with water
92. A greenish coating develops on copper utensils due to formation of
A. CuCO₃
B. Cu(OH)₂
C. Cu(OH)₂.CuCO₃
D. CuO
A. Calcium
B. Carbon
C. Iron
D. Silicon
90.. The second most abundant metal in the earth’s crust is
A. Oxygen
B. Silicon
C. Aluminium
D. Iron
91. An alloy of Zn and Cu is dissolved in dil. HCl. Hydrogen gas is evolved. In this evolution of gas
A. Only zinc reacts with dil. HCl
B. Only copper reacts with dil. HCl
C. Both zinc and copper react with dil. HCl
D. Only copper reacts with water
92. A greenish coating develops on copper utensils due to formation of
A. CuCO₃
B. Cu(OH)₂
C. Cu(OH)₂.CuCO₃
D. CuO
93. Rusting of iron takes place in
A. Ordinary water
B. Distilled water
C. Both ordinary & Distilled water
D. None of these
A. Ordinary water
B. Distilled water
C. Both ordinary & Distilled water
D. None of these
94. The bronze medals are made up of
A. Cu and Zn
B. Zn and Ni
C. Cu and Sn
D. Cu, Zn, Tn
95. Silver articles become black on prolonged exposure to air. This is due to the formation of
A. Ag₂O
B. Ag₂S
C. AgCN
D. Ag₂O and Ag₂S
96. During smelting, an additional substance is added which combines with impurities to form a fusible product known as
A. Slag
B. Mud
C. Gangue
D. Flux
97. A student placed an iron nail in copper sulphate solution. He observed the reddish brown coating on the iron nail which is
A. Soft and dull
B. Hard and flading
C. Smooth and shining
D. Rough and granular
98. Which among the given alloys contain non-metal as one of its constituents?
A. Brass
B. Amalgam
C. Gunmetal
D. None of these
99. An aluminium strip is kept immersed in freshly prepared ferrous sulphate solution taken in a test tube, the change observed is that
A. Green solution slowly turns brown
B. Lower end of test tube become slightly warm
C. A colourless gas with the smell of burning sulphur is observed
D. Light green solution changes to blue
100. Which of the given metals cannot be extracted using smelting?
A. Fe
B. Al
C. Zn
D. Pb
101. In general, the number of electrons in the outermost shell of a metal atom is
A. 1
B. 1 to 3
C. 5 to 8
D. 8
B. Zn and Ni
C. Cu and Sn
D. Cu, Zn, Tn
95. Silver articles become black on prolonged exposure to air. This is due to the formation of
A. Ag₂O
B. Ag₂S
C. AgCN
D. Ag₂O and Ag₂S
96. During smelting, an additional substance is added which combines with impurities to form a fusible product known as
A. Slag
B. Mud
C. Gangue
D. Flux
97. A student placed an iron nail in copper sulphate solution. He observed the reddish brown coating on the iron nail which is
A. Soft and dull
B. Hard and flading
C. Smooth and shining
D. Rough and granular
98. Which among the given alloys contain non-metal as one of its constituents?
A. Brass
B. Amalgam
C. Gunmetal
D. None of these
99. An aluminium strip is kept immersed in freshly prepared ferrous sulphate solution taken in a test tube, the change observed is that
A. Green solution slowly turns brown
B. Lower end of test tube become slightly warm
C. A colourless gas with the smell of burning sulphur is observed
D. Light green solution changes to blue
100. Which of the given metals cannot be extracted using smelting?
A. Fe
B. Al
C. Zn
D. Pb
101. In general, the number of electrons in the outermost shell of a metal atom is
A. 1
B. 1 to 3
C. 5 to 8
D. 8
102. Aluminum is used for making cooking utensils. Which of the following properties of aluminum are responsible for the same?
(a) Good thermal conductivity
(b) Good electrical conductivity
(c) Ductility
(d) High melting point
A. (A) & (B)
B. (A) & (C)
C. (B) & (C)
D. (A) & (D)
103. Which of the following metals is present in the anode mud during the electrolytic refining of copper?
(a) Sodium (b) Aluminium (c) Gold (d) Iron
104. An element reacts with oxygen to give a compound int. The compound is soluble in water. The element is likely to be
(a) calcium (b) carbon (c) iron (d) silicon
105. The second most abundant metal in the earth’s crust is
(a) oxygen (b) silicon (c) aluminium (d) iron
106 An alloy of Zn and Cu is dissolved in dil. HC1. Hydrogen gas is evolved. In this evolution of gas
(a) only zinc reacts with dil. HC1
(b) Good electrical conductivity
(c) Ductility
(d) High melting point
A. (A) & (B)
B. (A) & (C)
C. (B) & (C)
D. (A) & (D)
103. Which of the following metals is present in the anode mud during the electrolytic refining of copper?
(a) Sodium (b) Aluminium (c) Gold (d) Iron
104. An element reacts with oxygen to give a compound int. The compound is soluble in water. The element is likely to be
(a) calcium (b) carbon (c) iron (d) silicon
105. The second most abundant metal in the earth’s crust is
(a) oxygen (b) silicon (c) aluminium (d) iron
106 An alloy of Zn and Cu is dissolved in dil. HC1. Hydrogen gas is evolved. In this evolution of gas
(a) only zinc reacts with dil. HC1
(b) only copper reacts with dil. HC1
(c) both zinc and copper react with dil. HC1
(d) only copper reacts with water
107. A greenish coating develops on copper utensils due to formation of
(a) CuCo3 (b) Cu(OH)2 (c) Cu(OH)2.CuCO3 (d) CuO
108. Rusting of iron takes place in
(a) ordinary water
107. A greenish coating develops on copper utensils due to formation of
(a) CuCo3 (b) Cu(OH)2 (c) Cu(OH)2.CuCO3 (d) CuO
108. Rusting of iron takes place in
(a) ordinary water
(b) distilled water
(c) both ordinary and distilled water
(c) both ordinary and distilled water
(d) none of the above
109. The bronze medals are made up of
(a) Cu and Zn
109. The bronze medals are made up of
(a) Cu and Zn
(b) Zn and Ni
(c) Cu and Sn
(d) Cu, Zn, Tn
110 Silver articles becomes black on prolonged exposure to air. This is due to the formation of
110 Silver articles becomes black on prolonged exposure to air. This is due to the formation of
(a) Ag2O (b) Ag2S (c) AgCN (d) Ag2O and Ag2S
111. During smelting, an additional substance is added which combines with impurities to form a fusible product known as
(a) slag (b) mud (c) gangue (d) flux
112. A student placed an iron nail in copper sulphate solution. He observed the reddish brown coating on the iron nail which is
(a) soft and dull (
b) hard and flading
(c) smooth and shining
(d) rough and granular
113. Which among the following alloys contain non-metal as one of its constituents?
(a) Brass (b) Amalgam (c) Gun metal (d) None of these
114. An aluminium strip is kept immersed in freshly prepared ferrous sulphate solution taken in a test tube, the change observed is that
(a) Green solution slowly turns brown
(b) Lower end of test tube become slightly warm
c) A colourless gas with the smell of burning sulphur is observed
113. Which among the following alloys contain non-metal as one of its constituents?
(a) Brass (b) Amalgam (c) Gun metal (d) None of these
114. An aluminium strip is kept immersed in freshly prepared ferrous sulphate solution taken in a test tube, the change observed is that
(a) Green solution slowly turns brown
(b) Lower end of test tube become slightly warm
c) A colourless gas with the smell of burning sulphur is observed
(d) Light green solution changes to blue.
Question 115
The ability of metals to be drawn into thin wires is known as
(a) ductility
(b) malleability
(c) sonority
(d) conductivity
Question 116
Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?
(i) Good thermal conductivity
(ii) Good electrical conductivity
(iii) Ductility
(iv) High melting point
(a) (i) and (ii)
(b) (i) and (iii)
(c) (ii) and (iii)
(d) (i) and (iv)
Question 117
Due to its semiconductor properties the non-metal used in computer, T.V. etc. is
(a) Carbon
(b) Silicon
(c) Bromine
(d) Fluorine
Question 118
What happens when calcium is treated with water?
(i) It does not react with water.
(ii) It reacts violently with water.
(iii) It reacts less violently with water.
(iv) Bubbles of hydrogen gas formed stick to the surface of calcium.
(a) (i) and (iv)
(b) (ii) and (iii)
(c) (i) and (ii)
(d) (iii) and (iv)
Question 119.
Generally metals react with acids to give salt and hydrogen gas. Which of the following acids does not give hydrogen gas on reacting with metals (except Mn and Mg)?
(a) H2SO4
(b) HCl
(c) HNO3
(d) All of these
Question 120
Which of the following metals are obtained by electrolysis of their chlorides in molten state?
(i) Na
(ii) Ca
(iii) Fe
(iv) Cu
(a) (i) and (iv)
(b) (iii) and (iv)
(c) (i) and (iii)
(d) (i) and (ii)
Question 121
An alloy reacted with dilute hydrochloric acid to produce a gas which ‘pops’ a lighted splint. The residue reacted with dilute nitric acid to form a blue solution. Which one of the following pairs of metals is present in the alloy?
(a) Copper and lead
(b) Lead and magnesium
(c) Copper and magnesium
(d) Lead and zinc
Question 122
Which of the following metals exist in their native state in nature?
(i) Cu
(ii) Au
(iii) Zn
(iv) Ag
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (ii) and (iv)
(d) (iii) and (iv)
Question 123
Metals are refined by using different methods. Which of the following metals are refined by electrolytic refining?
(i) Au
(ii) Cu
(iii) Na
(iv) K
(a) (i) and (ii)
(b) (i) and (iii)
(c) (ii) and (iii)
(d) (iii)and (iv)
Question 124
Metal M occurs in the Earth’s crust as its oxide M2O3. An alloy of this metal is used in making aircrafts. The ore of the metal M is
(a) magnetite
(b) haematite
(c) bauxite5t5
(d) pyrolusite
Question 125.
Which one of the following four metals would be displaced from the solution of its salts by other three metals?
(a) Mg
(b) Ag
(c) Zn
(d) Cu
Question 126
2 mL each of concentrated HCl, HNO3 and a mixture of concentrated HCl and concentrated HNO3 in the ratio of 3 : 1 were taken in test tubes labelled as A, B and C. A small piece of metal was put in each test tube. No change occurred in test tubes A and B but the metal got dissolved in test tube C respectively. The metal could be
(a) Al
(b) Au
(c) Cu
(d) Pt
Question 127
An element A is soft and can be cut with a knife. This is very reactive to air and cannot be kept in open. It reacts vigorously with water. Identify the element from the following:
(a) Mg
(b) Na
(c) P
(d) Ca
Question 128.
Alloys are homogeneous mixtures of a metal with a metal or non-metal. Which among the following alloys contain non-metal as one of its constituents?
(a) Brass
(b) Bronze
(c) Amalgam
(d) Steel
Question 129
Reaction between X and Y, forms compound Z. X loses electron and Y gains electron. Which of the following properties is not shown by Z?
(a) Has high melting point
(b) Has low melting point
(c) Conducts electricity in molten state
(d) Occurs as solid
Question 130
The electronic configurations of three elements X, Y and Z are X – 2, 8; Y – 2, 8, 7 and Z – 2, 8, 2. Which of the following is correct?
(a) X is a metal.
(b) Y is a metal.
(c) Z is a non-metal.
(d) Y is a non-metal and Z is a metal
Question 131
Generally, non-metals are not conductors of electricity. Which of the following is a good conductor of electricity?
(a) Diamond
(b) Graphite
(c) Sulphur
(d) Fullerene
Question 132
Which of the following can undergo a chemical reaction?
(a) MgSO4 + Fe
(b) ZnSO2 + Fe
(c) MgSO2 + Pb
(d) CuSO2 + Fe
Question 133
The atomic numbers of four elements A, B, C and D are 6, 8, 10 and 12 respectively. The two elements which can react to form ionic bonds (or ionic compound) are:
(a) A and D
(b) B and C
(c) A and C
(d) B and D
Question 134
The atomic number of an element X is 19. The number of electrons in its ion X+ will be:
(a) 18
(b) 19
(c) 20
(d) 21
Question 135
The atomic number of an element Y is 17. The number of electrons in its ion Y– will be:
(a) 17
(b) 18
(c) 19
(d) 20
Question 136
Which of the following is an iron ore?
(a) Cinnabar
(b) Calamine
(c) Haematite
(d) Rock salt
Question 137
The metal which can be extracted from the bauxite ore is:
(a) Na
(b) Mn
(c) Al
(d) Hg
Question 138
In stainless steel alloy, iron metal is mixed with:
(a) Cu and Cr
(b) Cr and Ni
(c) Cr and Sn
(d) Cu and Ni
Question 139
Which of the following is an ore of mercury metal?
(a) Rock salt
(b) Cinnabar
(c) Calamine
(d) Haematite
Question 140
Which of the following pair of metals exist in their native state in nature?
(a) Ag and Hg
(b) Ag and Zn
(c) Au and Hg
(d) Au and Ag
Question 141
Which of the following alloys contains a non-metal as one of the constituents?
(a) Brass
(b) Amalgam
(c) Steel
(d) Bronze
Question 142
The metal which is always present in an amalgam is:
(a) iron
(b) aluminium
(c) mercury
(d) magnes
Question 143
Rock salt is an ore of one of the following metals. This metal is:
(a) Mn
(b) Na
(c) Fe
(d) Cu
144. The process in which the concentrated ore is heated below its melting point in the absence or limited supply of air is called …………….
145. Metal have ……………. melting and boiling points.
146. ……………. displaces copper from a solution of copper (II) sulphate.
147. Removal of impurities from a metal by chemical method is called …………….
148. Oxides of non-metals when dissolved in water generally give ……………. solutions.
149. A sulphide ore is concentrated by …………….
150. The chlorides of non-metals are …………….
151. Non-metals are ……………. in character
152 The impurities in the ores are removed by adding ……………
153. The rocky material found along with ores is known as ……
Question 154
Which of the following metals cannot be extracted using smelting?
(a) Fe
(b) Al
(c)Zn
(d) Pb
Question 115
The ability of metals to be drawn into thin wires is known as
(a) ductility
(b) malleability
(c) sonority
(d) conductivity
Question 116
Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?
(i) Good thermal conductivity
(ii) Good electrical conductivity
(iii) Ductility
(iv) High melting point
(a) (i) and (ii)
(b) (i) and (iii)
(c) (ii) and (iii)
(d) (i) and (iv)
Question 117
Due to its semiconductor properties the non-metal used in computer, T.V. etc. is
(a) Carbon
(b) Silicon
(c) Bromine
(d) Fluorine
Question 118
What happens when calcium is treated with water?
(i) It does not react with water.
(ii) It reacts violently with water.
(iii) It reacts less violently with water.
(iv) Bubbles of hydrogen gas formed stick to the surface of calcium.
(a) (i) and (iv)
(b) (ii) and (iii)
(c) (i) and (ii)
(d) (iii) and (iv)
Question 119.
Generally metals react with acids to give salt and hydrogen gas. Which of the following acids does not give hydrogen gas on reacting with metals (except Mn and Mg)?
(a) H2SO4
(b) HCl
(c) HNO3
(d) All of these
Question 120
Which of the following metals are obtained by electrolysis of their chlorides in molten state?
(i) Na
(ii) Ca
(iii) Fe
(iv) Cu
(a) (i) and (iv)
(b) (iii) and (iv)
(c) (i) and (iii)
(d) (i) and (ii)
Question 121
An alloy reacted with dilute hydrochloric acid to produce a gas which ‘pops’ a lighted splint. The residue reacted with dilute nitric acid to form a blue solution. Which one of the following pairs of metals is present in the alloy?
(a) Copper and lead
(b) Lead and magnesium
(c) Copper and magnesium
(d) Lead and zinc
Question 122
Which of the following metals exist in their native state in nature?
(i) Cu
(ii) Au
(iii) Zn
(iv) Ag
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (ii) and (iv)
(d) (iii) and (iv)
Question 123
Metals are refined by using different methods. Which of the following metals are refined by electrolytic refining?
(i) Au
(ii) Cu
(iii) Na
(iv) K
(a) (i) and (ii)
(b) (i) and (iii)
(c) (ii) and (iii)
(d) (iii)and (iv)
Question 124
Metal M occurs in the Earth’s crust as its oxide M2O3. An alloy of this metal is used in making aircrafts. The ore of the metal M is
(a) magnetite
(b) haematite
(c) bauxite5t5
(d) pyrolusite
Question 125.
Which one of the following four metals would be displaced from the solution of its salts by other three metals?
(a) Mg
(b) Ag
(c) Zn
(d) Cu
Question 126
2 mL each of concentrated HCl, HNO3 and a mixture of concentrated HCl and concentrated HNO3 in the ratio of 3 : 1 were taken in test tubes labelled as A, B and C. A small piece of metal was put in each test tube. No change occurred in test tubes A and B but the metal got dissolved in test tube C respectively. The metal could be
(a) Al
(b) Au
(c) Cu
(d) Pt
Question 127
An element A is soft and can be cut with a knife. This is very reactive to air and cannot be kept in open. It reacts vigorously with water. Identify the element from the following:
(a) Mg
(b) Na
(c) P
(d) Ca
Question 128.
Alloys are homogeneous mixtures of a metal with a metal or non-metal. Which among the following alloys contain non-metal as one of its constituents?
(a) Brass
(b) Bronze
(c) Amalgam
(d) Steel
Question 129
Reaction between X and Y, forms compound Z. X loses electron and Y gains electron. Which of the following properties is not shown by Z?
(a) Has high melting point
(b) Has low melting point
(c) Conducts electricity in molten state
(d) Occurs as solid
Question 130
The electronic configurations of three elements X, Y and Z are X – 2, 8; Y – 2, 8, 7 and Z – 2, 8, 2. Which of the following is correct?
(a) X is a metal.
(b) Y is a metal.
(c) Z is a non-metal.
(d) Y is a non-metal and Z is a metal
Question 131
Generally, non-metals are not conductors of electricity. Which of the following is a good conductor of electricity?
(a) Diamond
(b) Graphite
(c) Sulphur
(d) Fullerene
Question 132
Which of the following can undergo a chemical reaction?
(a) MgSO4 + Fe
(b) ZnSO2 + Fe
(c) MgSO2 + Pb
(d) CuSO2 + Fe
Question 133
The atomic numbers of four elements A, B, C and D are 6, 8, 10 and 12 respectively. The two elements which can react to form ionic bonds (or ionic compound) are:
(a) A and D
(b) B and C
(c) A and C
(d) B and D
Question 134
The atomic number of an element X is 19. The number of electrons in its ion X+ will be:
(a) 18
(b) 19
(c) 20
(d) 21
Question 135
The atomic number of an element Y is 17. The number of electrons in its ion Y– will be:
(a) 17
(b) 18
(c) 19
(d) 20
Question 136
Which of the following is an iron ore?
(a) Cinnabar
(b) Calamine
(c) Haematite
(d) Rock salt
Question 137
The metal which can be extracted from the bauxite ore is:
(a) Na
(b) Mn
(c) Al
(d) Hg
Question 138
In stainless steel alloy, iron metal is mixed with:
(a) Cu and Cr
(b) Cr and Ni
(c) Cr and Sn
(d) Cu and Ni
Question 139
Which of the following is an ore of mercury metal?
(a) Rock salt
(b) Cinnabar
(c) Calamine
(d) Haematite
Question 140
Which of the following pair of metals exist in their native state in nature?
(a) Ag and Hg
(b) Ag and Zn
(c) Au and Hg
(d) Au and Ag
Question 141
Which of the following alloys contains a non-metal as one of the constituents?
(a) Brass
(b) Amalgam
(c) Steel
(d) Bronze
Question 142
The metal which is always present in an amalgam is:
(a) iron
(b) aluminium
(c) mercury
(d) magnes
Question 143
Rock salt is an ore of one of the following metals. This metal is:
(a) Mn
(b) Na
(c) Fe
(d) Cu
144. The process in which the concentrated ore is heated below its melting point in the absence or limited supply of air is called …………….
145. Metal have ……………. melting and boiling points.
146. ……………. displaces copper from a solution of copper (II) sulphate.
147. Removal of impurities from a metal by chemical method is called …………….
148. Oxides of non-metals when dissolved in water generally give ……………. solutions.
149. A sulphide ore is concentrated by …………….
150. The chlorides of non-metals are …………….
151. Non-metals are ……………. in character
152 The impurities in the ores are removed by adding ……………
153. The rocky material found along with ores is known as ……
Question 154
Which of the following metals cannot be extracted using smelting?
(a) Fe
(b) Al
(c)Zn
(d) Pb
Question 155
In general, the number of electrons in the outermost shell of a metal atom is
(a) 1
(b) 1 to 3
(c) 5 to 8
(d) 8
Question 156
Aluminum is used for making cooking utensils. Which of the following properties of aluminum are responsible for the same?
(i)Good thermal conductivity
(ii)Good electrical conductivity
(iii) Ductility
(iv) High melting point
(a) (i) and (ii)
(b) (i) and (iii)
(c) (ii) and (iii)
(d) (i) and (iv)
Question 157
Two Statement are made
Statement A: Zinc is used in the galvanization of iron
Statement B: Its coating on Iron articles increasing the life of it by protecting it from rusting
(a)Statement A is correct only
(b) Statement A is correct only
(c) Both Statement A and B are correct
(d) Both Statement A and B are incorrect
Question 158
Hematite is an ore of
(a) iron
(b) aluminum
(c) copper
(d) tin
Question 159
Metals are refined by using different methods. Which of the following metals are refined by electrolytic refining?
(a) Au
(b) Cu
(c) Na
(d) K
Question 160
Copper sulphate solution can be easily kept in a container made of
(a)Lead
(b) Zinc
(c) Silver
(d) Aluminum
Question 161
Blue gold is an alloy of
(a)Gold and aluminum
(b) Gold and indium
(c) Gold and silver
(d) Gold and copper
Blue gold is alloy of gold and gallium or indium
Question 162
Which of the following is incorrect?
(a)Zinc Oxide is called as amphoteric oxide
(b) Silicon counts among metalloids
(c) Sodium is kept open in air
(d) Metals conduct electricity
Question 163
Which metal can be displaced by copper from its salt solution?
(a)Silver
(b) Zinc
(c) Iron
(d) sodium
Question 164
Which of the following oxide cannot be reduced with carbon to obtain the metal?
(a)MnO2
(b) Cr2O3
(c) Al2O3
(d)All the above
Question 165
Which is correct order as per the reactivity of the metals
(a) Zn > Fe > Cu > Ag
(b) Fe > Zn > Cu > Ag
(c) Cu > Zn > Fe > Ag
(d) Zn > Cu > Fe > Ag
Question 166
Although metals form basic oxides, which of the following metals form an amphoteric oxide?
(a) Al
(b) Ca
(c) Na
(d) Cu
Question 167
Which of the following non-metal is good conductor of electricity?
(a) Graphite
(b) Phosphorus
(c) Hydrogen
(d) Bromine
Question 168
Which among the following alloys contain mercury as one of its constituents?
(a) Stainless steel
(b) Alnico
(c) Solder
(d) Zinc amalgam
Question 169
Two statement are made
Statement A: The lustre of a metal is due to presence of free electrons
Statement B: Metals conducts heat
(a) Statement A is correct only
(b) Statement B is correct only
(c) Statement A and B both are correct
(d) Statement A and B both are incorrect
Question 171
Which of the following oxide(s) of iron would be obtained on prolonged reaction of iron with steam?
(a) FeO
(b) Fe2O3
(c) Fe3O4
(d) Fe2O3 and Fe3O
Question 172
Which of the following is true?
(a) Color of basic copper carbonate is green
(b) Malachite is an ore of Copper
(c) Aluminum is more reactive than Copper
(d) All the above
Question 173
The ability of metals to be drawn into thin wire is known as
(a) Ductility
(b) Malleability
(c) Sonority
(d) Conductivity
Question 174
What happens when calcium is treated with water?
(i) It does not react with water
(ii) It reacts violently with water
(iii) It reacts less violently with water
(iv) Bubbles of hydrogen gas formed stick to the surface of calcium
(a) (i) and (iv)
(b) (ii) and (iii)
(c) (i) and (ii)
(d) (iii) and (iv)
Question 175
The percentage of lead in pencil is:
(a)Zero
(b)20
(c)80
(d)70
Question 176
Which of the following metals occur in their pure state?
(a)Copper
(b)Iron
(c)Zinc
(d)Gold
Question 177
Silicon is used in
(a)Solar energy devices
(b)Semiconductors
(c)Transistors
(d)All of these
Question 178
Which of the following is a noble metal?
(a)Copper
(b)Iron
(c)Gold
(d)Aluminum
Question 179
When a metal is added to dilute HCI solution, there is no evolution of gas. Metal is
(a)K
(b)Na
(c)Ag
(d)Zn
Question 180
Removal of impurities from ore is known as
(a)Crushing and grinding
(b)Concentration of ore
(c)Calcinations
(d)Roasting
Question 181
Concentrated sulphuric acid acts as:
(a)Oxidizing agent
(b)Dehydrating agent
(c)Both
(d)None of these
Question 182
Forth floatation method is used for the concentration of
(a)Oxide ores
(b)Sulphide ores
(c)Sulphate ores
(d)Halide ores
Question 183
Nature of SO2 is:
(a)Basic
(b)Acidic
(c)Amphoteric
(d)Neutral
Question 184
Heating of concentrated ore in absence of air for conversion into oxide ore is known as
(a)Roasting
(b)Calcinations
(c)Reduction
(d)None of these
Question 185
Which of the following metal will not displace hydrogen from steam, dilute acids and alkalies?
(a)Iron
(b)Zinc
(c)Mercury
(d)Calcium
Question 186
Which reducing agent is used in chemical reduction
(a)C
(b)CO
(c)AI
(d)None of these
Question 187
What is anode mud
(a)Fan of anode
(b)Metal of anode
(c)Impurities collected at anode in electrolysis during purification of metals
(d)All of these
Question 188
When a non- metal reacts with chlorine, it forms
(a)An ionic chloride
(b)A covalent chloride
(c)A tetrachloride
(d)A dichloride
Question 189
Which of the following methods are suitable for preventing an iron frying pan from rusting?
(a)Applying grease
(b)Applying paint
(c)Applying a coating of zinc
(d)All of the above
Question 190
Out of the following, which cannot be obtained by electrolysis of aqueous solution of the salt?
(a)Ag
(b)Mg
(c)Cu
(d)Cr
Question 191
Aluminum is used in thermite welding because
(a)Aluminum is a light metal
(b)Aluminum has more affinity for oxygen
(c)Aluminum is a strong oxidizing agent
(d)Aluminum is a reactive metal
Question 192
Which of the following process is used for the concenWhich of the following process is used for the concentration of Bauxite (AI2O3. 2H2O)?
(a)Forth floatation
(b)Leaching
(c)Liquation
(d)Magnetic separation
Question 193
The best malleable metal is
(a)Aluminum
(b)Silver
(c)Gold
(d)Lead
Question 194
The process of extraction of metal from its ores, is known as
(a)Concentration
(b)Calcination
(c)Purification
(d)Metallurgy
Question 195
Which is used as catalyst in Haber’s process?
(a)Cr
(b)AI
(c
The percentage of lead in pencil is:
(a)Zero
(b)20
(c)80
(d)70
Question 176
Which of the following metals occur in their pure state?
(a)Copper
(b)Iron
(c)Zinc
(d)Gold
Question 177
Silicon is used in
(a)Solar energy devices
(b)Semiconductors
(c)Transistors
(d)All of these
Question 178
Which of the following is a noble metal?
(a)Copper
(b)Iron
(c)Gold
(d)Aluminum
Question 179
When a metal is added to dilute HCI solution, there is no evolution of gas. Metal is
(a)K
(b)Na
(c)Ag
(d)Zn
Question 180
Removal of impurities from ore is known as
(a)Crushing and grinding
(b)Concentration of ore
(c)Calcinations
(d)Roasting
Question 181
Concentrated sulphuric acid acts as:
(a)Oxidizing agent
(b)Dehydrating agent
(c)Both
(d)None of these
Question 182
Forth floatation method is used for the concentration of
(a)Oxide ores
(b)Sulphide ores
(c)Sulphate ores
(d)Halide ores
Question 183
Nature of SO2 is:
(a)Basic
(b)Acidic
(c)Amphoteric
(d)Neutral
Question 184
Heating of concentrated ore in absence of air for conversion into oxide ore is known as
(a)Roasting
(b)Calcinations
(c)Reduction
(d)None of these
Question 185
Which of the following metal will not displace hydrogen from steam, dilute acids and alkalies?
(a)Iron
(b)Zinc
(c)Mercury
(d)Calcium
Question 186
Which reducing agent is used in chemical reduction
(a)C
(b)CO
(c)AI
(d)None of these
Question 187
What is anode mud
(a)Fan of anode
(b)Metal of anode
(c)Impurities collected at anode in electrolysis during purification of metals
(d)All of these
Question 188
When a non- metal reacts with chlorine, it forms
(a)An ionic chloride
(b)A covalent chloride
(c)A tetrachloride
(d)A dichloride
Question 189
Which of the following methods are suitable for preventing an iron frying pan from rusting?
(a)Applying grease
(b)Applying paint
(c)Applying a coating of zinc
(d)All of the above
Question 190
Out of the following, which cannot be obtained by electrolysis of aqueous solution of the salt?
(a)Ag
(b)Mg
(c)Cu
(d)Cr
Question 191
Aluminum is used in thermite welding because
(a)Aluminum is a light metal
(b)Aluminum has more affinity for oxygen
(c)Aluminum is a strong oxidizing agent
(d)Aluminum is a reactive metal
Question 192
Which of the following process is used for the concenWhich of the following process is used for the concentration of Bauxite (AI2O3. 2H2O)?
(a)Forth floatation
(b)Leaching
(c)Liquation
(d)Magnetic separation
Question 193
The best malleable metal is
(a)Aluminum
(b)Silver
(c)Gold
(d)Lead
Question 194
The process of extraction of metal from its ores, is known as
(a)Concentration
(b)Calcination
(c)Purification
(d)Metallurgy
Question 195
Which is used as catalyst in Haber’s process?
(a)Cr
(b)AI
(c
)Ni
(d)Fe
Question 196
The process to heat the ore in the presence of excess supply of air below its melting point is called
(a)Roasting
(b)Calcination
(c)Smelting
(d)Liquation
Question 197
Stainless steel is usually made by alloying iron with:
(a)Fe and Cu
(b)Cu and Cr
(c)Cu ad Ni
(d)Cr and Ni
Question 198
Which of the following metals constitutes the alloys magnalium
(a)Al, Cu
(b)Al, Fe
(c)Al, Mg
(d)Al, Mn
Question 199
One of the constituents of amalgam is
(a)Aluminum
(b)Copper
(c)Iron
(d)Mercury
Question 200
German silver is an alloy of:
(a)Copper
(b)Magnesium
(c)Lead
(d)Iron
Question 201
The white phosphorus is stored
(a)In air
(b)Under water
(c)Under kerosene
(d)Under CS2
Question 202
Bronze is an alloy of copper and:
(a)Tin
(b)Aluminum
(c)Zinc
(d)Lead
Question 203
The chief ore of aluminum is
(a)Bauxite
(b)Cryolite
(c)Alunite
(d)Feldspar
Question 204
Formula of magnetite is
(a)Fe2O3
(b)FeS2
(c)FeCO3
(d)Fe3O4
205. The most reactive metal is:
(a) Iron
(b) Gold
(c) Zinc
(d) Potassium.
206 The liquid metal at room temperature
(a) Mercury
(b) Bromine
(c) Sodium
(d) Gold.
207. Non-metals are:
(a) generally liquids
(b) generally gases
(c) generally solids and gases
(d) generally gases and liquids.
208. The metal which is stored in kerosene:
(a) Phosphorus
(b) Magnesium
(c) Sodium
(b) Magnesium
209. The non-metal which is liquid at room temperature is:
(a) Carbon
(b) Iodine
(c) Bromine
(d) Chlorine.
210. Materials around us can be classified into
(a) Elements and compounds
(b) Metals and non-metals
(c) Acids and bases
(d) None of these.
(d)Fe
Question 196
The process to heat the ore in the presence of excess supply of air below its melting point is called
(a)Roasting
(b)Calcination
(c)Smelting
(d)Liquation
Question 197
Stainless steel is usually made by alloying iron with:
(a)Fe and Cu
(b)Cu and Cr
(c)Cu ad Ni
(d)Cr and Ni
Question 198
Which of the following metals constitutes the alloys magnalium
(a)Al, Cu
(b)Al, Fe
(c)Al, Mg
(d)Al, Mn
Question 199
One of the constituents of amalgam is
(a)Aluminum
(b)Copper
(c)Iron
(d)Mercury
Question 200
German silver is an alloy of:
(a)Copper
(b)Magnesium
(c)Lead
(d)Iron
Question 201
The white phosphorus is stored
(a)In air
(b)Under water
(c)Under kerosene
(d)Under CS2
Question 202
Bronze is an alloy of copper and:
(a)Tin
(b)Aluminum
(c)Zinc
(d)Lead
Question 203
The chief ore of aluminum is
(a)Bauxite
(b)Cryolite
(c)Alunite
(d)Feldspar
Question 204
Formula of magnetite is
(a)Fe2O3
(b)FeS2
(c)FeCO3
(d)Fe3O4
205. The most reactive metal is:
(a) Iron
(b) Gold
(c) Zinc
(d) Potassium.
206 The liquid metal at room temperature
(a) Mercury
(b) Bromine
(c) Sodium
(d) Gold.
207. Non-metals are:
(a) generally liquids
(b) generally gases
(c) generally solids and gases
(d) generally gases and liquids.
208. The metal which is stored in kerosene:
(a) Phosphorus
(b) Magnesium
(c) Sodium
(b) Magnesium
209. The non-metal which is liquid at room temperature is:
(a) Carbon
(b) Iodine
(c) Bromine
(d) Chlorine.
210. Materials around us can be classified into
(a) Elements and compounds
(b) Metals and non-metals
(c) Acids and bases
(d) None of these.
211. All metals are solids except
(a) Sodium
(b) Calcium
(c) Mercury
(d) Hydrogen.
212 Metal oxides are of nature
(a) Acidic
(b) Basic
(c) Neutral
(d) All of these.
213. The metal which can be cut with a knife
(a) Sodium and potassium
(b) Barium and calcium
(c) Sodium and mercury
(d) Potassium and calcium.
214. When non-metals react with water then
(a) Hydrogen gas is formed
(b) Carbon dioxide gas is formed
(c) Non-metals do not react with water
(d) None of these.
215. Which of the following metals catch fire on reaction with air?
A. Magnesium
B. Manganese
C. Potassium
D. Calcium
216. When MgO is dissolved in water, Mg(OH)2 is obtained. The solution thus obtained is ___ in nature.
A. amphoteric
B. alkaline
C. neutral
D. acidic
217. Which of the following metals does not react even with steam.?
A. Silver
B. Iron
C. Calcium
D. Sodium
218. Identify the non-metal which exists in a liquid state in room temperature 25∘C.
A. Aluminium
B. Mercury
C. Iodine
D. Bromine
219. Which of the following pairs of compounds undergo displacement reaction when they react with each other?
A. Cu and AgNO3 solution
B. Ag and FeSO4 solution
C. Cu and NaCl solution
D. Mg and NaCl solution
220. A reaction in which a more reactive metal replaces a less reactive metal from its salt solution is called a/an ________ reaction.
A. combination
B. displacement
C. double displacement
D. addition
221. Food cans are coated with tin and not with zinc because:
A. Zinc is less reactive than tin.
B. Zinc is more reactive than tin.
C. Zinc has a higher melting point than tin.
D. Zinc is costlier than tin.
222. Metals, except Al and Zn, react with oxygen to form _______ oxides.
A. acidic
B. neutral
C. amphoteric
D. basic
223. When sulphur reacts with oxygen, the oxide formed is ___ in nature.
A. alkaline
B. neutral
C. basic
D. acidi
(a) Sodium
(b) Calcium
(c) Mercury
(d) Hydrogen.
212 Metal oxides are of nature
(a) Acidic
(b) Basic
(c) Neutral
(d) All of these.
213. The metal which can be cut with a knife
(a) Sodium and potassium
(b) Barium and calcium
(c) Sodium and mercury
(d) Potassium and calcium.
214. When non-metals react with water then
(a) Hydrogen gas is formed
(b) Carbon dioxide gas is formed
(c) Non-metals do not react with water
(d) None of these.
215. Which of the following metals catch fire on reaction with air?
A. Magnesium
B. Manganese
C. Potassium
D. Calcium
216. When MgO is dissolved in water, Mg(OH)2 is obtained. The solution thus obtained is ___ in nature.
A. amphoteric
B. alkaline
C. neutral
D. acidic
217. Which of the following metals does not react even with steam.?
A. Silver
B. Iron
C. Calcium
D. Sodium
218. Identify the non-metal which exists in a liquid state in room temperature 25∘C.
A. Aluminium
B. Mercury
C. Iodine
D. Bromine
219. Which of the following pairs of compounds undergo displacement reaction when they react with each other?
A. Cu and AgNO3 solution
B. Ag and FeSO4 solution
C. Cu and NaCl solution
D. Mg and NaCl solution
220. A reaction in which a more reactive metal replaces a less reactive metal from its salt solution is called a/an ________ reaction.
A. combination
B. displacement
C. double displacement
D. addition
221. Food cans are coated with tin and not with zinc because:
A. Zinc is less reactive than tin.
B. Zinc is more reactive than tin.
C. Zinc has a higher melting point than tin.
D. Zinc is costlier than tin.
222. Metals, except Al and Zn, react with oxygen to form _______ oxides.
A. acidic
B. neutral
C. amphoteric
D. basic
223. When sulphur reacts with oxygen, the oxide formed is ___ in nature.
A. alkaline
B. neutral
C. basic
D. acidi
Assertions
224.Assertion : Different metals have different reactivities with water and dilute acids.
Reason : Reactivity of a metal depends on its position in the reactivity series.
225. Assertion : When zinc is added to a solution of ironII) sulphate, no change is observed.
Reason : Zinc is less reactive than iron.
224.Assertion : Different metals have different reactivities with water and dilute acids.
Reason : Reactivity of a metal depends on its position in the reactivity series.
225. Assertion : When zinc is added to a solution of ironII) sulphate, no change is observed.
Reason : Zinc is less reactive than iron.
226. Assertion : Gas bubbles are observed when sodium carbonate is added to dilute hydrochloric acid
Reason : Carbon dioxide is given off in the reaction.
227. Assertion : Food cans are coated with tin and not
with zinc.
Reason : Zinc is more reactive than tin.
228. Assertion : Platinum, gold and silver are used to make jewellery.
Reason : Platinum, gold and silver are least reactive metals.
229. Assertion : Iron is found in the free state n nature.
Reason : Iron a highly reactive element.
Ans : (d) Assertion (A) is false but reason (R) is true.
230. Assertion : Carbon reacts with oxygen to form carbon dioxide which is an acidic oxide.
Reason : Non-metals form acidic oxides.
231. Assertion : Metals are sonorous.
Reason : They are generally brittle in the solid state; they break into pieces when hammered.
Ans : (c)
232. Assertion : Coke and flux are used in smelting.
Reason : The phenomenon in which ore is mixed with suitable flux and coke is heated to fusion is known as smelting.
Ans : (b) Both assertion (A) and reason (R) are
true but reason (R) is not the correct explanation of
assertion (A).
Smelting is a process of applying heat to ore in order
to extract a base metal. It is used to extract many
metals from their ores, including silver, iron, copper,
and other base metals.
233 Assertion : Leaching is a process of reduction.
Reason : Leaching involves treatment of the ore
with a suitable reagent so as to make it solube while impurities remains insoluble.
Ans : (d)
234. Assertion : Lead, tin and bismuth are purified by liquation method.
Reason : Lead, tin and bismuth have low m.p. as
compared to impurities.
Ans : (a)
235. Assertion : Leaching is a process of reduction.
Reason : Leaching involves treatment of the ore with a suitable reagent so as to make it soluble while impurities remains insoluble.
Ans : (d) Assertion (A) is false but reason (R) is true.
Leaching is a process where ore is soluble and impurities are insoluble, widely used extractive metallurgy technique which converts metals into soluble salts in aqueous media.
Reason : Leaching involves treatment of the ore with a suitable reagent so as to make it soluble while impurities remains insoluble.
Ans : (d) Assertion (A) is false but reason (R) is true.
Leaching is a process where ore is soluble and impurities are insoluble, widely used extractive metallurgy technique which converts metals into soluble salts in aqueous media.
236. Assertion : Levigation is used for the separation of oxide ores from impurities.
Reason : Ore particles are removed by washing in a
current of water.
Ans : (c) Assertion (A) is true but reason (R) is false.
Levigation method is commonly used for oxide ores
such as haematite, tin stone and native ores of Au,
Ag, etc.
237. Assertion : Zinc is used in the galvanisation of iron.
Reason : Its coating on iron articles increases their life by protecting them from rusting.
238. Assertion (A) : When a piece of copper metal is added to dilute sulphuric acid, the solution turns blue.
Reason (R) : Copper reacts with dilute sulphuric acid to form copper (II) sulphate solution.
239. Assertion : Froth floatation process is based on the different wetting nature of ore and gangue particles.
Reason : Mustard oil is used as frother in froth floation process.
Ans : (b)
240. Assertion : Zinc becomes dull in most air.
Reason : Zinc is coated by a thin film of its basic
carbonate in moist air.
Ans : (a)
241. Assertion : Bronze is an alloy of lead and tin.
Reason : Alloys are heterogeneous mixture of metals with other metals and non-metals.
Reason : Alloys are heterogeneous mixture of metals with other metals and non-metals.
242. Assertion : A mineral is called ore, when metal is extracted from it conveniently and economically.
Reason : All ores are minerals but all minerals are not ores.
243. Assertion : In alumino thermite process, the metals like iron melts due to the heat evoloved in the reaction.
Reason : The reaction is
Fe2 3 O Al Al O Fe + + 2 2 $ 2 3
244. Assertion : Zinc oxide amphoteric in nature.
Reason : Zinc oxide reacts with both acids and bases.
245. Assertion : Zinc can easily displace Copper on reacting with a solution of copper sulphate.
Reason : Copper is more reactive metal as compared to Zinc.
246. Assertion : Magnesium chloride is an ionic compound.
Reason : Metals and non-metals react by mutual
transfer of electrons.
Reason : Zinc oxide reacts with both acids and bases.
245. Assertion : Zinc can easily displace Copper on reacting with a solution of copper sulphate.
Reason : Copper is more reactive metal as compared to Zinc.
246. Assertion : Magnesium chloride is an ionic compound.
Reason : Metals and non-metals react by mutual
transfer of electrons.
247. Assertion : Gold is isolated from other impurities by Arndt forest cyanide process.
Reason : The cyanide which is used here dissolve all possible impurities.
Ans : (c) Assertion (A) is true but reason (R) is false.
The cyanide dissolves gold by forming a complex.
Reason : The cyanide which is used here dissolve all possible impurities.
Ans : (c) Assertion (A) is true but reason (R) is false.
The cyanide dissolves gold by forming a complex.
248 Assertion : In the metallurgy of Al, purified Al O2 3 is
mixed with Na AlF 3 6 or CaF2 .
Reason : It lowers the melting point of the mixture
and brings conductivity.
Ans : (a) Both assertion (A) and reason (R) are true
and reason (R) is the correct explanation of assertion
(A).
In the metallurgy of aluminium, purified Al2 3 O is
mixed with Na AlF 3 3 or CaF2 which lowers the melting
point of the mix and brings conductivity.
249.. Assertion : Zinc carbonate is heated strongly in presence of air to form zinc oxide and carbon dioxide.
Reason : Calcination is the process in which a
carbonate ore is heated strongly in the absence of air to convert into metal oxide
250. Assertion : Iron pyrite is not useful in the extraction of Fe.
Reason : SO2 polluting gas is produced during
extraction.
Ans : (a)
Pyrite is composed of iron and sulphur. The sulphur
content during extraction may contaminate the metal and reduces the strength.
251. Assertion : Usually the sulphide ore is converted to oxide before reduction.
Reason : Reduction of oxides occurs easier
252. Assertion : While the extraction of copper, one of the steps involved is
Cu S Cu O Cu SO 2 2 + + 2 6 $ 2
Reason : In this reaction Cu S2 is the reducing agent
whereas Cu O2 is the oxidising agent.
Ans : (c) Assertion (A) is true but reason (R) is false.
The Cu2+ ion in both the compounds gets reduced
while sulphur gets oxidised.
Question 253
Which of the following metals cannot be extracted using smelting?
(a) Fe
(b) Al
(c)Zn
(d) Pb
Question 254
In general, the number of electrons in the outermost shell of a metal atom is
(a) 1
(b) 1 to 3
(c) 5 to 8
(d) 8
Question 255
Aluminum is used for making cooking utensils. Which of the following properties of aluminum are responsible for the same?
(i)Good thermal conductivity
(ii)Good electrical conductivity
(iii) Ductility
(iv) High melting point
(a) (i) and (ii)
(b) (i) and (iii)
(c) (ii) and (iii)
(d) (i) and (iv)
Which of the following metals cannot be extracted using smelting?
(a) Fe
(b) Al
(c)Zn
(d) Pb
Question 254
In general, the number of electrons in the outermost shell of a metal atom is
(a) 1
(b) 1 to 3
(c) 5 to 8
(d) 8
Question 255
Aluminum is used for making cooking utensils. Which of the following properties of aluminum are responsible for the same?
(i)Good thermal conductivity
(ii)Good electrical conductivity
(iii) Ductility
(iv) High melting point
(a) (i) and (ii)
(b) (i) and (iii)
(c) (ii) and (iii)
(d) (i) and (iv)
Question 256
Two Statement are made
Statement A: Zinc is used in the galvanization of iron
Statement B: Its coating on Iron articles increasing the life of it by protecting it from rusting
(a)Statement A is correct only
(b) Statement A is correct only
(c) Both Statement A and B are correct
(d) Both Statement A and B are incorrect
Question 257
Hematite is an ore of
(a) iron
(b) aluminum
(c) copper
(d) tin
Question 258
Metals are refined by using different methods. Which of the following metals are refined by electrolytic refining?
(a) Au
(b) Cu
(c) Na
(d) K
Question 259
Copper sulphate solution can be easily kept in a container made of
(a)Lead
(b) Zinc
(c) Silver
(d) Aluminum
Question 260
Blue gold is an alloy of
(a)Gold and aluminum
(b) Gold and indium
(c) Gold and silver
(d) Gold and copper
Question 261
Which of the following is incorrect?
(a)Zinc Oxide is called as amphoteric oxide
(b) Silicon counts among metalloids
(c) Sodium is kept open in air
(d) Metals conduct electricity
Question 262
Which metal can be displaced by copper from its salt solution?
(a)Silver
(b) Zinc
(c) Iron
(d) Silver
Question 263
Which of the following oxide cannot be reduced with carbon to obtain the metal?
(a)MnO2
(b) Cr2O3
(c) Al2O3
(d)All the above
Question 264
Which is correct order as per the reactivity of the metals
(a) Zn > Fe > Cu > Ag
(b) Fe > Zn > Cu > Ag
(c) Cu > Zn > Fe > Ag
(d) Zn > Cu > Fe > Ag
Question 265
Although metals form basic oxides, which of the following metals form an amphoteric oxide?
(a) Al
(b) Ca
(c) Na
(d) Cu
Question 266
Which of the following non-metal is good conductor of electricity?
(a) Graphite
(b) Phosphorus
(c) Hydrogen
(d) Bromine
Question 267
Which among the following alloys contain mercury as one of its constituents?
(a) Stainless steel
(b) Alnico
(c) Solder
(d) Zinc amalgam
(a) Stainless steel
(b) Alnico
(c) Solder
(d) Zinc amalgam
Question 268
Two statement are made
Statement A: The lustre of a metal is due to presence of free electrons
Statement B: Metals conducts heat
(a) Statement A is correct only
(b) Statement B is correct only
(c) Statement A and B both are correct
(d) Statement A and B both are incorrect
Question 269
Which of the following oxide(s) of iron would be obtained on prolonged reaction of iron with steam?
(a) FeO
270 Which Of The Following Can Undergo A Chemical Reaction?
[A]. MgSO4 + Fe
[B]. ZnSO4 + Fe
[C]. MgSO4 + Pb
[D]. CuSO4 + Fe
271.In Which Of The Following Statements Is Or Are Incorrect?
[A]. The most abundant non-metal in the earth’s crust is oxygen.
[B]. The most abundant metal in the earth’s crust is Aluminium.
[C]. Oxygen (O) is a non-metal which forms positively charged oxide ions (O2+) by gaining electrons.
[D]. Carbon is one of the most important non-metals because all the life on this earth is based on carbon compounds.
272.In The Last Year Board Examination, Rahul Were Asked A Question Where He Had To Choose The Statement Which Was/Were Incorrect? Will You Be Able To Answer This Question?
[A]. The major non-metals in the earth’s crust in the decreasing order of their abundance are: Nitrogen, Oxygen, Silicon, Phosphorus and Sulphur.
[B]. Two non-metals, hydrogen and oxygen are the main constituents of oceans (in the form of water).
[C]. Non-metals, oxygen and nitrogen are the main constituents of air.
[D]. The most abundant metal in the earth’s crust is Aluminium, which constitutes about 7% of the earth’s crust
273.The Electronic Configurations Of Three Elements X, Y And Z Are X — 2, 8; Y — 2, 8, 7 And Z — 2, 8, 2. Which Of The Following Is Correct?
[A]. X is a metal
[B]. Y is a metal
[C]. Z is a non-metal
[D]. Y is a non-metal and Z is a metal
274.Prachi Is Writing Some Statements But She Confused To Know Whether The Statements Are Correct Or Not? Would You Help Her?
[A]. Silver has the highest thermal conductivity.
[B]. Metals are good conductors of electricity because they contain free electrons and can move easily through the metal and conduct electric current.
[C]. The metals like iron and mercury offer comparatively greater resistance to the flow of current, so they have lower electrical conductivity.
[D]. None of them.
275.In A Science Quiz Competition, You Are Asked A Question Where You Have To Choose The Statement Which Is/ Are Incorrect?
[A]. Most of the metals are ductile.
[B]. Metals are generally good conductors of heat and electricity.
[C]. Sulphur and phosphorus are solid metals which are non-malleable and non-ductile.
[D]. As a non-metal graphite which is a good conductor of electricity
276.An Electrolytic Cell Consists Of:
[A]. Positively charged cathode, and negatively charged anode
[B]. Positively charged anode, and negatively charged cathode
[C]. Positively charged cathode, and positively charged anode
[D]. Negatively charged anode, and negatively charged cathod
277.In A Science Exam, You Are Asked A Question Where You Have To Choose The Statement Which Is/ Are Incorrect?
[A]. Iodine is a non-metal which is lustrous, having a shining surface.
[B]. Diamond is a non-metal which has a very high melting point and boiling point
[C]. Diamond and graphite is a good conductor of electricity.
[D]. Alkali metals (lithium, sodium and potassium) are soft (just like solid non-metals).
278.2mL Each Of Concentrated HCl, HNO3 And A Mixture Of Concentrated HCl And Concentrated HNO3 In The Ratio Of 3 : 1 Were Taken In Test Tubes Labelled As A, B And C. A Small Piece Of Metal Was Put In Each Test Tube. No Change Occurred In Test Tubes A And B But The Metal Got Dissolved In Test Tube C Respectively. The Metal Could Be
[A]. Al
[B]. Au
[C]. Cu
[D]. Pt
279.Generally, Non-Metals Are Not Lustrous. Which Of The Following Non-Metal Is Lustrous?
[A]. Sulphur
[B]. Oxygen
[C]. Nitrogen
[D]. Iodine
280.Stainless Steel Is Very Useful Material For Our Life. In Stainless Steel, Iron Is Mixed With:
[A]. Ni and Cr
[B]. Cu and Cr
[C]. Ni and Cu
[D]. Cu and Au
281.Galvanisation Is A Method Of Protecting Iron From Rusting By Coating With A Thin Layer Of
[A]. Gallium
[B]. Aluminium
[C]. Zinc
[D]. Silver
282.Mohan Is Writing Some Statements, Choose The Incorrect Statements And Help Him:
[A]. The most abundant non-metal in the earth’s crust is oxygen.
[B]. The most abundant metal in the earth’s crust is Aluminium.
[C]. Oxygen (O) is a non-metal which forms positively charged oxide ions (O2+) by gaining electrons.
[D]. Carbon is one of the most important non-metals because all the life on this earth is based on carbon compounds.
283.Silver Articles Become Black On Prolonged Exposure To Air. This Is Due To The Formation Of
[A]. Ag3N
[B]. Ag2O
[C]. Ag2S
[D]. Ag2S and Ag3N
284.Metals Are Refined By Using Different Methods. Which Of The Following Metals Are Refined By Electrolytic Refining?
[A]. Au and Cu
[B]. Au and Na
[C]. Cu and Na
[D]. Na and K
Q16
285.Which One Of The Following Properties Is Not Generally Exhibited By Ionic Compounds?
[A]. Solubility in water
[B]. Electrical conductivity in solid state
[C]. High melting and boiling points
[D]. Electrical conductivity in molten state
286.Gaurav Appeared In Class Test Where He Wrote Some Statements But He Confused To Know The Correct Statement. Would You Help Him To Know That?
[A]. Non-metals form negatively charged ions by gaining electrons when reacting with metals.
[B]. Non-metals form oxides which are either acidic or neutral.
[C]. Non-metals do not displace hydrogen from dilute acids. They react with hydrogen to form hydrides.
[D]. All the above
287.Generally, Metals React With Acids To Give Salt And Hydrogen Gas. Which Of The Following Acids Does Not Give Hydrogen Gas On Reacting With Metals (Except Mn And Mg)?
[A]. H2SO4
[B]. HCl
[C]. HNO3
[D]. All of thes
288.Anushka Is Writing Some Statement Which Is Given By Her Teacher. Would You Help Him To Choose The Incorrect Statements?
[A]. The metals at the top of the activity series (K, Na, Ca, Mg and Al) are so reactive that they are never found in nature as free elements.
[B]. Aqua regia, is a freshly prepared mixture of concentrated hydrochloric acid and dilute nitric acid in the ratio of 3:1.
[C]. Cinnabar (HgS) is an ore of mercury. When it is heated in air, it is first converted into mercuric oxide (HgO).
[D]. Sodium and chloride ions, being oppositely charged, attract each other and are held by strong electrostatic forces of attraction to exist as sodium chloride (NaCl).
289.What Happens When Calcium Is Treated With Water?
[A]. It does not react with water, Bubbles of hydrogen gas formed stick to the surface of calcium.
[B]. It reacts violently with water, It reacts less violently with water.
[C]. It does not react with water, It reacts violently with water.
[D]. It reacts violently with water, Bubbles of hydrogen gas formed stick to the surface of calcium
290.Which Of The Following Oxide(S) Of Iron Would Be Obtained On The Prolonged Reaction Of Iron With Steam?
[A]. FeO
[B]. Fe2O3
[C]. Fe3O4
[D]. Fe2O3 and Fe3O4
291.Which One Of The Following Metals Does Not React With Cold As Well As Hot Water?
[A]. Na
[B]. Ca
[C]. Mg
[D]. Fe
292.Which Of The Following Pairs Will Give Displacement Reactions?
[A]. NaCl solution and copper metal
[B]. MgCl2 solution and Aluminium metal.
[C]. FeSO4 solution and silver metal.
[D]. AgNO3 solution and copper metal
293.Aluminium Is Used For Making Cooking Utensils. Which Of The Following Properties Of Aluminium Are Responsible For The Same?
[A]. Good thermal conductivity, Good electrical conductivity
[B]. Good thermal conductivity, Ductility
[C]. Good electrical conductivity, Ductility
[D]. Good thermal conductivity, High melting point
294.Which Of The Following Property Is Generally Not Shown By Metals?
[A]. Electrical conduction
[B]. Sonorous in nature
[C]. Dullness
[D]. Ductility
295.Assertion (A) : Hydrogen gas is not evolved when a metal reacts with nitric acid.
Reason (R) : Nitric acid is a strong oxidising agent.
296.. Assertion (A) : Highly reactive metals are obtained by electrolytic reduction.
Reason (R) : In the electrolytic reduction, metal is deposited at the cathode.
297. Assertion (A): Bronze is an alloy of copper and tin.
Reason (R) : Alloys are heterogeneous mixture of metals with other metals and non-metals.
298. Assertion (A) : Zinc oxide is amphoteric in nature.
Reason (R): Zinc oxide reacts with both acids and bases.
299. Assertion (A) : Magnesium chloride is an ionic compound.
Reason (R) : Metals and non-metals react by mutual transfer of electrons.
300. Assertion (A): Zinc can easily displace copper on reacting with a solution of copper sulphate.
Reason (R) : Copper is more reactive metal as compared to Zinc.
301. Assertion (A) : Zinc carbonate is heated strongly in presence of air to form zinc oxide and carbon dioxide.
Reason (R) : Calcination is the process in which a carbonate ore is heated strongly in the absence of air to convert into metal oxide.
302. Assertion (A): Zinc becomes dull in moist air.
Reason (R) : Zinc is coated by a thin film of its basic carbonate in moist air.
303. Assertion (A) : MgCl2, is a covalent compound.
Reason (R) : MgCl2, is a good conductor of electricity in molten state
304.Assertion (A) : Anodising is a method to prevent metal from corrosion.
Reason (R) : Anodising is a process of coating iron with a layer of zinc.
305.. Assertion: The reaction of calcium with water is less violent in comparison to that of sodium.
Reason: The heat evolved is not sufficient for the hydrogen to catch fire.
306.. Assertion : C and N do not react with dil. HCl and dil. H2SO4.
Reason: Metals do not react with dil. HCl and dil. H2SO4
307.. Assertion : Copper displaces silver from silver nitrate solution.
Reason: Copper is more reactive than silver.
308. Assertion : Aluminum oxide and zinc oxide are acidic in nature.
Reason: Amphoteric nature means that substance have both acidic and basic character
309. Assertion : Different metals have different reactivities with water and dilute acids.
Reason: Reactivity of a metal depends on its position in the reactivity series
310.Assertion : Iron is the most widely used metal. But it is never used in its pure state.
Reason: Pure iron is very soft and stretches easily when hot
311. Assertion: Gold occurs in native state.
Reason: Gold is a reactive metal.
312.. Assertion : The property of beating a metal into sheets is called ductility.
Reason: Gold and silver are most malleable metals.
313. Assertion : Silver and gold do not react with oxygen even at high temperatures.
Reason: Silver and gold are less active metals.
314. Assertion : The oxides of sulphur and phosphorus are acidic in nature.
Reason: Metal oxides are basic in nature.
315.. Assertion : MgO exists in liquid state.
Reason: The electrostatic forces of attraction between Mg2+ and 02- ions constitute ionic bond
316. Assertion : On reacting with water, calcium starts floating over water.
Reason: Calcium reacts with cold water at room temperature.
317. Assertion : Electrovalency of Na is +1.
Reason: The number of electrons which an atom either loses or gains in the formation of an ionic bond is known as its valency.
318. Assertion: The arrangement of metals in order of decreasing reactivities is called reactivity series.
Reason: Metals at the top of series are very reactive and metals at the bottom are least reactive
319.. Assertion : Non-metals are electronegative in nature.
Reason: They have tendency to lose electrons.
320.. Assertion : Ionic compounds have high melting and boiling points.
Reason: A large amount of energy is required to break the strong inter-ionic attraction in ionic compounds.
321. Assertion : Metals in general have very high melting and boiling points.
Reason: Metals have the strongest chemical bonds which are metallic in nature.
322.. Assertion : Metals generally act as reducing agents.
Reason: The reducing character is expressed in terms of electron releasing tendency.
323. Assertion : Magnesium reacts with oxygen upon heating and burns brightly to form magnesium oxide.
Reason: Magnesium oxide is basic in nature.
324.. Assertion : Bromine cannot displace chlorine from its salt solution.
Reason: Chlorine is more reactive than bromine
325. Assertion: Iron can be obtained from Fe2O3 by reduction with aluminium.
Reason: The process is known as thermite process.
326.• Assertion: Elements Pt, Ag, noble gases, etc. occur in native state in nature.
Reason: Elements which are attacked by moisture, oxygen and CO2 of air occur in native state.
327. Assertion: Reactivity Series is an arrangement of element based on their position Reason: Reactivity Series is used to separate elements based on their reactivity.
328.Assertion: Bauxite is the most important ore of Aluminium.
Reason: Carbon is used to reduce bauxite to aluminium.
329. Assertion: Brass is an alloy of Zinc and Magnesium.
Reason: Alloys are homogenous mixture of two or more metals.
330. Select odd one out from the following elements.
(a) Bismut
(b) Copper
(c) Zinc
(d) Arsenic
331. Which element is present at the top of the reactivity series and is stored in kerosene oil?
(a) Potassium
(b) Tin
(c) Lead
(d) Gold
Reason: The number of electrons which an atom either loses or gains in the formation of an ionic bond is known as its valency.
318. Assertion: The arrangement of metals in order of decreasing reactivities is called reactivity series.
Reason: Metals at the top of series are very reactive and metals at the bottom are least reactive
319.. Assertion : Non-metals are electronegative in nature.
Reason: They have tendency to lose electrons.
320.. Assertion : Ionic compounds have high melting and boiling points.
Reason: A large amount of energy is required to break the strong inter-ionic attraction in ionic compounds.
321. Assertion : Metals in general have very high melting and boiling points.
Reason: Metals have the strongest chemical bonds which are metallic in nature.
322.. Assertion : Metals generally act as reducing agents.
Reason: The reducing character is expressed in terms of electron releasing tendency.
323. Assertion : Magnesium reacts with oxygen upon heating and burns brightly to form magnesium oxide.
Reason: Magnesium oxide is basic in nature.
324.. Assertion : Bromine cannot displace chlorine from its salt solution.
Reason: Chlorine is more reactive than bromine
325. Assertion: Iron can be obtained from Fe2O3 by reduction with aluminium.
Reason: The process is known as thermite process.
326.• Assertion: Elements Pt, Ag, noble gases, etc. occur in native state in nature.
Reason: Elements which are attacked by moisture, oxygen and CO2 of air occur in native state.
327. Assertion: Reactivity Series is an arrangement of element based on their position Reason: Reactivity Series is used to separate elements based on their reactivity.
328.Assertion: Bauxite is the most important ore of Aluminium.
Reason: Carbon is used to reduce bauxite to aluminium.
329. Assertion: Brass is an alloy of Zinc and Magnesium.
Reason: Alloys are homogenous mixture of two or more metals.
330. Select odd one out from the following elements.
(a) Bismut
(b) Copper
(c) Zinc
(d) Arsenic
331. Which element is present at the top of the reactivity series and is stored in kerosene oil?
(a) Potassium
(b) Tin
(c) Lead
(d) Gold
332. Which of the following property is generally not shown by metals?
(a) Electrical conduction
(b) Sonorous in nature
(c) Dullness
(d) Ductility
(b) Sonorous in nature
(c) Dullness
(d) Ductility
333.The ability of metals to be drawn into thin wire is known as
(a) ductility
(b) malleability
(c) sonorousity
(d) lustrous
335. The ability of metals to be drawn into thin wire is known as
(c) sonorousity
(d) lustrous
336 Which one of the following metals do not react with cold as well as hot water?
(a) Na
(b) Ca
(c) Mg
(d) Fe
(a) Na
(b) Ca
(c) Mg
(d) Fe
337. Which of the following oxide(s) of iron would be obtained on prolonged reaction of iron
with steam?
(a) FeO
(b) Fe2O3
(c) Fe3O4
(d) Fe2O3 and Fe3O4
338. What happens when calcium is treated with water?
(i) It does not react with water
(ii) It reacts violently with water
(iii) It reacts less violently with water
(iv) Bubbles of hydrogen gas formed stick to the surface of calcium
(a) (i) and (iv) (b) (ii) and (iii)
(c) (i) and (ii) (d) (iii) and (iv)
339. Generally metals react with acids to give salt and hydrogen gas. Which of the following
acids does not give hydrogen gas on reacting with metals (except Mn and Mg)?
(a) H2SO4
(b) HCl
(c) HNO3
(d) All of these
340. The composition of aqua-regia is
(a) Dil.HCl : Conc. HNO3
3 : 1
(b) Conc.HCl : Dil. HNO3
3 : 1
(c) Conc.HCl : Conc.HNO3
3 : 1
(d) Dil.HCl : Dil.HNO3
3 : 1
341. Which of the following are not ionic compounds
1.Kcl
11.Hcl
(iii) CCl4
(iv) NaCl
(a) (i) and (ii) (b) (ii) and (iii)
(c) (iii) and (iv) (d) (i) and (iii)
342. Which one of the following properties is not generally exhibited by ionic compounds?
(a) Solubility in water
(b) Electrical conductivity in solid state
(c) High melting and boiling points
(d) Electrical conductivity in molten state
343.Which of the following metals exist in their native state in nature?
(i) Cu
(ii) Au
(iii) Zn
(iv) Ag
(a) (i) and (ii) (b) (ii) and (iii)
(c) (ii) and (iv) (d) (iii) and (iv)
344. Metals are refined by using different methods. Which of the following metals are refined
by electrolytic refining?
(i) Au
(ii) Cu
(iii) Na
(iv) K
(a) (i) and (ii) (b) (i) and (iii)
(c) (ii) and (iii) (d) (iii) and (iv)
345. Silver articles become black on prolonged exposure to air. This is due to the formation of
(a) Ag3N
(b) Ag2O
(c) Ag2S
(d) Ag2S and Ag3N
346. Galvanisation is a method of protecting iron from rusting by coating with a thin layer of
(a) Gallium
(b) Aluminium
(c) Zinc
(d) Silver
347. Stainless steel is very useful material for our life. In stainless steel, iron is mixed with
(a) Ni and Cr
(b) Cu and Cr
(c) Ni and Cu
(d) Cu and Au
348. If copper is kept open in air, it slowly loses its shining brown surface and gains a green
coating. It is due to the formation of
Cuso4
Cuco3
Cuno32q
Cuo
349. Generally, metals are solid in nature. Which one of the following metals is found in
liquid state at room temperature?
(a) Na
(b) Fe
(c) Cr
(d) Hg
350.Which of the following metals are obtained by electrolysis of their chlorides in molten
state ?
(i) Na
(ii) Ca
(iii) Fe
(iv) Cu
(a) (i) and (iv) (b) (iii) and (iv)
(c) (i) and (iii) (d) (i) and (ii)
351. Generally, non-metals are not lustrous. Which of the following nonmetal is lustrous?
(a) Sulphur
(b) Oxygen
(c) Nitrogen
(d) Iodine
352.. Which one of the following four metals would be displaced from the solution of its salts
by other three metals?
(a) Mg
(b) Ag
(c) Zn
(d) Cu
353. 2 mL each of concentrated HCl, HNO3 and a mixture of concentrated HCl and
concentrated HNO3 in the ratio of 3 : 1 were taken in test tubes labelled as A, B and C. A
small piece of metal was put in each test tube. No change occurred in test tubes A and B
but the metal got dissolved in test tube C respectively. The metal could be
(a) Al
(b) Au
(c) Cu
(d) Pt
354 An alloy is
(a) an element
(b) a compound
(c) a homogeneous mixture
(d) a heterogeneous mixture
355. An electrolytic cell consists of
(i) positively charged cathode
(ii) negatively charged anode
(iii) positively charged anode
(iv) negatively charged cathode
(a) (i) and (ii) (b) (iii) and (iv)
(c) (i) and (iii) (d) (ii) ad (iv)
356. During electrolytic refining of zinc, it gets
(a) deposited on cathode
(b) deposited on anode
(c) deposited on cathode as well as anode
(d) remains in the solution
357.An element A is soft and can be cut with a knife. This is very reactive to air and cannot
be kept open in air. It reacts vigorously with water. Identify the element from the
following
(a) Mg
(b) Na
(c) P
(d) Ca
358.Alloys are homogeneous mixtures of a metal with a metal or nonmetal. Which among the ollowing alloys contain non-metal as one of its constituents?
(a) Brass
(b) Bronze
(c) Amalgam
(d) Steel
359. Which among the following statements is incorrect for magnesium metal?
(a) It burns in oxygen with a dazzling white flame
(b) It reacts with cold water to form magnesium oxide and evolves hydrogen gas
(c) It reacts with hot water to form magnesium hydroxide and evolves hydrogen gas
(d) It reacts with steam to form magnesium hydroxide and evolves hydrogen gas
360. Which among the following alloys contain mercury as one of its constituents?
(a) Stainless steel
(b) Alnico
(c) Solder
(d) Zinc amalgam
361. Reaction between X and Y, forms compound Z. X loses electron and Y gains electron.
Which of the following properties is not shown by Z?
(a) Has high melting point
(b) Has low melting point
(c) Conducts electricity in molten state
(d) Occurs as solid
362The electronic configurations of three elements X, Y and Z are X — 2, 8; Y — 2, 8, 7
and Z — 2, 8, 2. Which of the following is correct?
(a) X is a metal
(b) Y is a metal
(c) Z is a non-metal
(d) Y is a non-metal and Z is a metal
363. Although metals form basic oxides, which of the following metals form an amphoteric
oxide?
(a) Na
(b) Ca
(c) Al
(d) Cu
364. Generally, non-metals are not conductors of electricity. Which of the following is a good
conductor of electricity?
(a) Diamond
(b) Graphite
(c) Sulphur
(d) Fullerene
365. Electrical wires have a coating of an insulting material. The material, generally used is
(a) Sulphur
(b) Graphite
(c) PVC
(d) All can be used
366.Which of the following non-metals is a liquid?
(a) Carbon
(b) Bromine
(c) Phosphorus
(d) Sulphur
367.Which of the following can undergo a chemical reaction?
(a) MgSO4 + Fe
(b) ZnSO4 + Fe
(c) MgSO4 + Pb
(d) CuSO4 + Fe
368. Which of the following can be beaten into thin sheets?
(a) Zinc (b) Phosphorus (c) Sulphur (d) Oxygen
369. Which of the following statements is correct?
(a) All metals are ductile.
(b) All non-metals are ductile.
(c) Generally, metals are ductile.
(d) Some non-metals are ductile.
370. Which of the following is not a metal?
(a) copper
(b) sulphur
(c) aluminium
(d) iron
371.The substance that will be flattened on beating with a hammer is
(a) crystal of iodine
(b) lump of sulphur
(c) piece of coal
(d) zinc granule
372. Arun has learnt that non-metals on beating with a hammer are generally broken into pieces.
Which of the following is a nonmetal?
(a) iron nail
(b) aluminium wire
(c) copper plate
(d) piece of coal
373. Materials which can be drawn into wires are called ductile. Which of the following is not a
ductile material?
(a) silver
(b) copper
(c) sulphur
(d) aluminium
374. Metals are generally hard. Which of the following metals is an exception and can
(b) sodium
(c) gold
(d) magnesium
375. Metals are generally solid. Which of the following metals is in the liquid state at room
temperature?
(a) mercury
(b) silver
(c) aluminium
(d) sodium
376. Metals generally react with dilute acids to produce hydrogen gas. Which one of the
following metals does not react with dilute hydrochloric acid?
(a) magnesium
(b) aluminium
(c) iron
(d) copper
377. Which of the following reacts with cold water vigorously?
(a) carbon
(b) sodium
(c) magnesium
(d) sulphur
378. The metal which produces hydrogen gas on reaction with dilute hydrochloric acid as well
as sodium hydroxide solution is
(a) copper
(b) iron
(c) aluminium
(d) sodium
379. Which of the following non-metals reacts and catches fire on exposure to air?
(a) phosphorus
(b) nitrogen
(c) sulphur
(d) hydrogen
380 Generally metallic oxides are basic and non-metallic oxides are acidic in nature. Solution
of which of the following oxides in water will change the colour of blue litmus to red?
(a) sulphur dioxide
(b) magnesium oxide
(c) iron oxide
(d) copper oxide
381. Which of the following property is not responsible for copper to be used as electrical
conduction wires?
(a) ductility
(b) colour
(c) good conductor of electricity
(d) it is solid
382. Fill in the blanks :
(a) Phosphorus is very __________ non-metal.
(b) Metals are __________ conductors of heat and __________.
(c) Iron is __________ reactive than copper.
(d) Metals react with acids to produce __________ gas.
383. A substance is malleable, ductile and electropositive in nature. What type of substance is
it?
384. What property of a metal makes it possible to draw it into wires?
385. Why are metals good conductors?
386 Name the metal which is commonly used for making cooking utensils
387. Fill in the blanks:
(a) __________ is liquid metal
(b) __________ is only liquid Non metals
(c) __________, __________ and __________ are soft metal
(d) __________ is the hardest natural substance
(e) __________ and __________ are have low melting points. They melt in the palm
of the hand
(f) Metals can be beaten into thin sheets so they are called __________
(g) Non metals are bad conductors of electricity except __________
(h) Metals react with oxygen to form __________ oxides
(i) Some metal oxides show acidic and basic properties. They are called __________.
Eg :- Aluminum oxide, Zinc oxide etc.
(j) Al2O3 + 6HCl __________ + 3H2O
(k) Al2O3 + NaOH __________ + H2O
(l) __________ and __________ does not react with oxygen even at high temperature.
(m) Metals like potassium and sodium react vigorously with oxygen and catch fire if
kept in open. Hence they are stored i
(n) Magnesium reacts only with __________ water to form magnesium hydroxide and
hydrogen.
(o) Metals like aluminium, iron and zinc react only with __________ to form the metal
oxides and hydrogen.
(p) __________ gas is not evolved when metals react with nitric acid (HNO3) because
it is a strong oxidising agent
(q) A more reactive metal displaces a __________ reactive metal from its salt solution
(r) The arranging of metals in the decreasing order of their reactivity is called
__________ series of metals.
(s) Metals lose electrons and become positive ions. So they are called __________
elements
(t) Non metals __________ electrons and become negative ions. So they are called
electro negative elements
(u) __________ are compounds formed by the transfer of electrons from a metal to a
non metal.
(v) If one of the metals in an alloy is mercury, it is called an __________
(w) __________ is the damage caused to metals due to the reaction of metals with
oxygen, moisture, carbon dioxide etc.
(x) Some elements show properties of both metals and non metals. They are called
__________
(y) __________ is a mixture of concentrated nitric acid and concentrated hydrochloric
acid in the ratio 1:3.
388. Name one electrovalent compounds in each case in which ;
(i)One atom combines with one other atom
(ii)One atom combines with two other atoms
(iii)One atom combines with three other atoms
389. Give reasons for the following :
(a) Aluminium foils are used to wrap food items.
(b) Immersion rods for heating liquids are made up of metallic substances.
(c) Copper cannot displace zinc from its salt solution.
(d) Sodium and potassium are stored in kerosene.
390. Can you store lemon pickle in an aluminium utensil? Expla
391. Fill in the blanks to complete the following paragraph.
(a) The name of the product formed in the reaction of sulphur and
(b) _____________ is sulphur dioxide gas. When sulphur dioxide is
(c) dissolved in_________________, sulphurous acid is formed. The
(d) sulphurous acid turns _____________ litmus paper to ____________.
(e) Generally oxides of __________ are acidic in nature.
After completing the paragraph write two questions which you can raise on the basis of this
information.
58. Arun prepared a blue coloured solution of c
