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Q.

How much electricity in terms of Faraday is required to produce 100g of Ca from molten CaCl2?

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a

3 F

b

1 F   

c

5 F

d

2 F

answer is D.

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Detailed Solution

CaCl2→Ca2++2Cl−

Ca2++2e−2 moles→Ca1 mol  (40g)

 40 g of Ca≡ 2 F

100 g of Ca≡ 5 F

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