OnlineCBT
Chemistry · PYQ NEET UG 2020
हिन्दीThe number of Faradays (F) required to produced \( 20\text{ g} \) of calcium from molten \( \mathrm{CaCl_2} \) (Atomic mass of \( \mathrm{Ca} = 40\text{ g mol}^{-1} \)) is _______.
View Answer & Solution
Correct answer · Option D
1
Explanation
Reaction: \( \mathrm{Ca^{2+} + 2e^- \rightarrow Ca} \). 1 mole of Ca (40 g) requires 2 Faradays. Thus, 20 g of Ca requires \( \frac{2}{40} \times 20 = 1\text{ Faraday} \).
