The products obtained at the cathode and anode respectively during the electrolysis of aqueous `K_2SO_4` solution using platinum electrodes are

Options

A. `O_2,H_2`
B. `H_2,O_2`
C. `H_2SO_2`
D. `K,SO_2`

Answer

B

Explanation

`K_(2)SO_(4) to 2K^(+)+SO_(4)^(2-)`.
Self ionisation of water takes place because of platinum electrodes.
`H_(2)O to 2H^(+)+OH^(-)`.
At cathode `: 2H^(-) +2e^(-)to H_(2)`.
At Anode `: 4OH^(-) to O_(2)+2H_(2)O He^(-)`
`H_(2),O_2` gases liberated at Cathode and Anode.