The products obtained at the cathode and anode respectively during the electrolysis of aqueous `K_(2) SO_(4)` solution using platinum electrodes are

Options

A. `O_(2),H_(2)`
B. `H_(2)O_(2)`
C. `H_(2),SO_(2)`
D. `K,SO_(2)`

Answer

B

Explanation

At cathode: Hydrogen
At anode: oxygen and water
The reactions that occur during electrolysis are:
At Anode (oxidation of water):
`2H_(2)O --- gt 4H^(+) +O_(2)+ 4e`
At Cathode (reduction of water):
`4H_(2)O+ 4e --- gt 2H_(2)+ 4OH`
Complete reaction: `2H_(2)O --- gt2H_(2)+ O_(2)`