Q. 84.4( 5 Votes )

Which gas is rele A. H2

B. O2

C. CI2

D. CO2

Answer :

When bleaching powder is kept open in air, it reacts with CO2 which is present in air to form calcium carbonate and chlorine gas. The reaction takes place:


Thus, chlorine gas is released when bleaching powder is kept in open air.

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