Equilibrium

Also,

and

Thus,



or

For the reaction :

Partial pressure Mole fraction

and




Hence,


On doing cross multiplication



or

In the reaction :



Only O acts as Bronsted acid among the given options as it donate the proton to give ions.

On long standing bleaching powder undergoes auto-oxidation to form calcium chloride, and calcium chlorate . Following reaction takes place:

Chemical formula of bleaching powder

Salt of oxoacid is
Here, oxoacid is
Anhydride of is .