A carbon rod is to be coated with copper. A battery, a container half-filled with copper sulphate solution, a copper plate and a carbon rod is available. Choose the option with the right set of connections.

Connect the carbon rod to positive terminal and the copper plate to the negative terminal of the battery.

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Connect the carbon rod to the negative terminal and the copper plate to the positive terminal of the battery.

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Connect the carbon rod and the copper plate to any of the terminals.

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Connect the carbon rod and the copper plate to the positive terminal.

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Solution

The correct option is B Connect the carbon rod to the negative terminal and the copper plate to the positive terminal of the battery.
Copper ions from copper sulphate solution deposit on the electrode connected to negative terminal of the battery. So, the carbon stick should be connected to the negative terminal of the battery.
Simultaneously, copper ions in the solution are provided from the electrode connected to the positive terminal of the battery. So, he should connect the copper plate to positive terminal of the battery.

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