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Question
Paheli wants to electroplate a machine part with zinc. She uses an arrangement as shown in the figure. Select the correct combination of electrodes. 
Paheli wants to electroplate a machine part with zinc. She uses an arrangement as shown in the figure. Select the correct combination of electrodes.
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Solution
The correct option is A A = Zinc plate, B = Machine part
In the process of electroplating, the deposition of layers of one metal takes place on the other material. In this process, the material on which the coating is to be done is connected as an electrode to the negative terminal, and the metal that is used for the deposition is connected to the positive terminal. In this case, Paheli wants to add a zinc coating on the machine part. So, the zinc plate has to be connected to A, i.e., the positive terminal and the machine part has to be connected to the negative terminal, i.e., B.
Therefore, option A is correct.
In the process of electroplating, the deposition of layers of one metal takes place on the other material. In this process, the material on which the coating is to be done is connected as an electrode to the negative terminal, and the metal that is used for the deposition is connected to the positive terminal. In this case, Paheli wants to add a zinc coating on the machine part. So, the zinc plate has to be connected to A, i.e., the positive terminal and the machine part has to be connected to the negative terminal, i.e., B.
Therefore, option A is correct.
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