MHT CET 2022 Chemistry question

How many faraday of electricity is required to produce 5 g of magnesium from magnesium chloride? (molar mass Mg = 24 g )

Answer: (B)

Solution

The cathode reaction is , so 2 F (2 mol of electrons) deposit 1 mol (24 g) of Mg. Moles of Mg in 5 g mol. Charge required $= 0.2083×2 = 0.4167\

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Question ID VK-097145