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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.

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B

Carbon gets coated on the copper plate.

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C

Copper gets coated on the carbon rod.

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D

The mass of the carbon rod decreases.

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Solution

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 electrode (carbon rod).


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