Question

Que.2 A) Give scientific reason (Any Two)
i) Biogas is an eco-friendly fuel.
ii) Bleaching powder has the odour of chlorine.
iii) Soap forms a precipitate in hard water.​

Answer 1

Answer:

Bleaching powder is a yellowish white powder with a strong smell of chlorine. When exposed to air, bleaching powder gives a smell of chlorine. This is because bleaching powder reacts with carbon dioxide from the atmosphere to produce calcium carbonate and chlorine gas