If you pass current through copper sulphate solution, copper gets deposited on the plate connected to the which terminal of the battery?

Negative

The correct answer is option 2. Negative.

When you pass current through a copper sulfate solution using a battery, copper gets deposited on the plate connected to the negative terminal.

Here's the explanation:

1. Electrolysis of Copper Sulfate Solution:

When an electric current is passed through a copper sulfate (CuSO₄) solution, the process of electrolysis occurs.
   - The copper sulfate dissociates into copper ions (Cu²⁺) and sulfate ions (SO₄²⁻) in the solution.

2. Electrode Reactions:

At the cathode (negative electrode), reduction takes place. Copper ions (Cu²⁺) gain electrons and get reduced to form solid copper (Cu) metal. This copper is deposited on the cathode.

At the anode (positive electrode), oxidation takes place. Sulfate ions (SO₄²⁻) lose electrons and get oxidized.

3. Direction of Current Flow:

Conventional current flows from the positive terminal of the battery to the negative terminal. Electrons flow in the opposite direction.

Therefore, the copper ions (Cu²⁺) in the solution are attracted to the cathode (negative electrode)

4. Copper Deposition:

At the cathode, copper ions gain electrons and get reduced, leading to the deposition of solid copper on the electrode connected to the negative terminal of the battery.

In summary, during the electrolysis of copper sulfate solution, copper gets deposited on the plate connected to the negative terminal of the battery (cathode).