MHT CET Chemistry question
A solution containing one mole per litre each of Cu(NO), AgNO, Hg(NO) and Mg(NO), is electrolyzed using inert electrodes. Standard electrode potential in volts reduction potential are : Ag | Ag = +0.80 V Hg | 2Hg = 0.01 V Cu | Cu = +0.34 V Mg | Mg = -2.37 V With increasing voltage, the sequence of deposition of metals on the cathode will be
Answer: (A)
Solution
The ion with the higher reduction potential is reduced (deposited) first as the voltage is raised, so on the data given the order is Ag (+0.80 V) > Cu
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