Question

In the given arrangement, if we replace the copper plate connected to the negative terminal of the battery with a carbon rod, which of the following happens?

• A. The mass of the copper plate increases.
• B. Carbon gets coated on the copper rod.
• C. Copper gets coated on the carbon rod.
• D. The mass of the carbon rod decreases.

Answer 1

The correct option is C

Copper gets coated on the carbon rod.

If we replace the copper plate which was connected to the negative terminal of the battery with a carbon rod, we obtain a coating of copper on the carbon rod. The copper ions from the solution (copper sulphate) get deposited on the electrodes (carbon rods).