Question

Why the bleaching powder decompose itself even in airtight containor?

Answer 1

Bleaching Powder. ... 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.

Answer 2

Bleaching powder decomposes in air as follows: Due to this, bleaching powder is packed in air tight containers.