AIIMIIT bleaching powder

1.what is common name of bleaching powder
2.how bleaching powder is prepared
3.what are uses of bleaching powder
4.what happens when bleaching powder reacts with air
5.why bleaching powder is used as disinfectant
6.how does bleaching powder bleach.is it by oxidation or reduction
7.what is colour of bleaching powder
8.write formula of bleaching powder and write its molecular weight
9.what is meant by available chlorine
10.what chlorine acts bleaching agaent and disinfectant
11.