Question

During electrolysis of copper sulphate, ___ gets deposited at the cathode.

• A. Copper
• B. Copper sulphate
• C. Hydrogen
• D. Oxygen

Answer 1

The correct option is D Oxygen

When copper sulphate is electrolyzed, copper and sulphate ions are formed. Then, reddish brown copper is deposited at the cathode and bubbles of oxygen are evolved at the anode. The reactions are as follows:
Anode:
$C{u}^{2+}+2e^{-}\to Cu$
Cathode:
$4O{H}^{-}\to O_2+2H_{2}O+4e^{-}$