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Intensity of blue colour increases gradually when _________________

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Intensity of blue colour increases gradually when _________________

(a) copper rod is dipped in silver nitrate solution

(b) silver rod is dipped in copper nitrate solution

(c) zinc rod is dipped in silver solution

(d) copper rod is dipped in zinc rod solution

The question was posed to me in final exam.

My question is taken from Redox Reactions in Terms of Electron Transfer Reactions topic in portion Redox Reactions of Chemistry – Class 11

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The correct option is (a) copper rod is dipped in silver nitrate solution

The explanation: When a copper rod is dipped in silver nitrate solution, a redox reaction occurs between Copper and an aqueous solution of silver nitrate. So the intensity of blue colour increases gradually as silver deposits on the rod.

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