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NEET 2020
Exam
NEET
Year
2020
Subject
Chemistry
Chapter
Electrochemistry

NEET 2020 · Chemistry · Electrochemistry

The number of Faradays(F) required to produce 20g of calcium from...

The number of Faradays(F) required to produce 20g20g of calcium from molten CaCl2{CaCl}_{2} (Atomic mass of Ca=40gmol–1Ca = 40g{mol}^{– 1}) is

Options

  1. A22
  2. B33
  3. C44
  4. D11

Correct answer

D. 11

Step-by-step solution

Ca+2+2e−→Ca(s){Ca}^{+ 2} + 2{e}^{-} \to Ca\left(s\right)
Valency Factor =2= 2
As per Faraday's 1st{1}^{st} law, Charge passed in Faraday = Number of gram equivalent of product.
=2040×2=1F= \dfrac{20}{40} \times 2 = 1F
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