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Solution


Q.

The number of Faradays (F) required to produce 20 g of calcium from molten CaCl2 (Atomic mass of Ca = 40 g mol-1) is             [2020]
1 1  
2 2  
3 3  
4 4  

Ans.

(1)

Ca(aq)2++2e-→Ca(s)2F(1 mole=40g)1F20g

Thus, one Faraday is required to produce 20 g of calcium from molten CaCl2.