When 50% solution of `H_(2)SO_(4)` is electrolysed by passing a current of high density at low temperature the main products of electrolysis are:

Options

A. oxygen and hydrogen
B. `H_(2)` and peroxy disulphuric acid
C. `H_(2)` and `SO_(2)`
D. `O_(2)` and peroxy disulphuric acid

Answer

B

Explanation

`2H_(2)SO_(4)hArr2H^(+)+2HSO_(4)^(-)`
Cathode `2H^(+)rarr2e^(-)+H_(2)`
Anode `2HSO_(4)^(-)rarrH_(2)S_(2)O_(8)` (peroxy disulphuric acid)+`2e^(-)`