When gas `A` is passed through dry `KOH` at low temperature, a deep red coloured compound, `B` and a gas care obtained. The gas `A`, on reaction with but-2-ene, followed by treatment with `Zn//H_2 O` yields acetaldehyde. Identify `A, B` and `C`.

Explanation

The reaction of gas (A) with but-2-ene followed by treatment with `Zn /H_(2)O` gives `CH_(3)CHO`. This shows that the has (A) is ozone `(O_(3))`.

Reaction of `O_(3)` with `KOH`
`2KOH+underset((A))(5O_(3))rarrunderset((B))underset("(Red colour)")underset("ozonide")underset("Potessium")(2KO_(3))+underset((C))(5O_(2))+H_(2)O`