(a) Which effect of electric current is utilised when a thin layer of chromium metal is deposited on an iron tap? What is this process known as?
(b) For electroplating copper on an iron object, which terminal of the battery (positive or negative) is connected to the iron object? Also, name the electrolyte you will use for this purpose.

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Solution

(a) Chemical effect of current is utilized. Here electrical energy cause chemical change (redox reaction). The process is known as electroplating.

(b) Iron is connected to the negative terminal of the battery. Copper sulphate solution is used as the electrolyte.

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(a) Chemical effect of current is utilized. Here electrical energy cause chemical change (redox reaction). The process is known as electroplating. (b) Iron is connected to the negative terminal of the battery. Copper sulphate solution is used as the electrolyte.

(a) Chemical effect of current is utilized. Here electrical energy cause chemical change (redox reaction). The process is known as electroplating.

(b) Iron is connected to the negative terminal of the battery. Copper sulphate solution is used as the electrolyte.