JEE Main 2012 Chemistry question
The standard potentials of , , and electrodes are 0.80, 0.79, 0.34 and −2.37 V, respectively. An aqueous solution which contains one mole per litre of the salts of each of the four metals is electrolyzed. With increasing voltage, the correct sequence of deposition of the metals at the cathode is
Answer: (3)
Solution
Ions with higher reduction potentials are discharged first: Ag (0.80), then Hg (0.79), then Cu (0.34).
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