Question

A Green coloured salt X decomposes to form black coloured compound Y with the liberation of W2

gas. The gas liberated when passed through limewater turns it milky.

Identify X,Y and W2.

note:- 2 is a superscript in 'W2'
and is down but there is no option to do that. So dont get confused​

Answer 1

Answer:

the correct answer for the above text is w2