Published by:
CGP EDU Academic Team
Published on: August 14, 2026
The number of Faradays ( F ) required to produce 20 g of calcium from molten 
(Atomic mass of 
) is
Text Solution
Verified by ExpertsThe correct answer is:
D
1 equivalent of any substance is deposited by F of charge.
Calculate the charge on Ca in 
as:
Cl has -1 charge.
We have to get 20 g Ca from 
.
Number of required moles 
mass 
molar mass
Molar mass of Ca is 
and required mass of Ca is 20 g .
Hence, number of moles 
.
Electricity required to produce 1 mol of calcium 
The electricity required to produce 0.5 mol of calcium
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