Question

A COMPOUND X IS USED FOR DRINKING HAS PH=7.ITS ACIDIFIED SOL. UNDERGOES DECOMPOSITION IN THE PRESENCE OF ELECTRICITY TO PRODUCE GASES Y AND Z .THE VOLUME OF Y IS DOUBLE THAN Z.Y IS HIGHLY COMBUSTIBLE WHEREAS Z IS SUPPORTER OF COMBUSTION .IDENTIFY X,Y,Z AND WRITE THE BALANCED CHEMICAL EQUATION

Answer 1

Compound X is Water ( H₂O) It's Neutral Hence PH 7 .
On Electrolytic Decomposition It gives off diHydrogen (H₂) and diOxygen (O₂) molecule

Hydrogen released is double the amount of Oxygen.So, Y will be Hydrogen which burns and Z will be Oxygen which is Reduced during combustion.

Reaction:
$2H_{2}O \to 2H_{2} +O_{2}$ 

Answer 2

Answer is in attachment..

Hope this helps...!!!