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JEE Main Chemistry question

ChemistryElectrochemistryJEE Main

How many of the following metals can be obtained by electrolysis of aqueous solutions of their salts? Ag, Ca, Cu, Mg, Na, Al

Answer: 2

Solution

Ca, Mg, Na and Al all have standard reduction potentials more negative than water ( V), so in their aqueous salt solutions water is preferentially reduced instead of the metal

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Question ID VK-144187