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QNEET-2020-Ch-661: NEET 2020 Chemistry - Class 12 NEET-2020-Ch-661 Solution: The number of Faradays(F) required to produce 20 g of calcium…
The number of Faradays(F) required to produce 20 g of calcium from molten (Atomic mass of Ca = 40 g ) is: 2 3 4 1
Multiple Choice Options
- A 2
- B 3
- C 4
- D 1
Step-by-Step Verified Solution
1 equivalent of any substance is deposited by 1F of charge.
We have 20g calcium.
No. of equivalent = g i v e n m a s s e q u i v a l e n t m a s s
Ca 2+ + 2e _ _ Ca(s)
v.f. = 2
According to Faraday's 1st law
Charge passed in Faradey = g. equivalent of product
= 20 40 _ 2 = 1 F
So, 1 F of charge is required.