1.define catenation
2.define tetravalency
3.apart from carbon what other elements show tetravalency and catenation property
4.why carbon always forms covalent bonds only
5.why covalent bond in carbon is strong
6.what is valency of carbon explain
7.why carbon can form millions of compounds
8.why carbon compounds are called as organic chemistry
9.abbreviate IUPAC
10.who proposed tetravalency
11.what is atomic number of carbon and which group and period it belongs
12.what is first organic compound prepared in the laboratory
13.what is the formula of urea
2.define tetravalency
3.apart from carbon what other elements show tetravalency and catenation property
4.why carbon always forms covalent bonds only
5.why covalent bond in carbon is strong
6.what is valency of carbon explain
7.why carbon can form millions of compounds
8.why carbon compounds are called as organic chemistry
9.abbreviate IUPAC
10.who proposed tetravalency
11.what is atomic number of carbon and which group and period it belongs
12.what is first organic compound prepared in the laboratory
13.what is the formula of urea
14.who craeted first organic substance in lab
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