Question

Match List I with List II
List-I
(Conversion)| **List-II **
(Shape/geometry)
---|---
(A)| 1 mol of H2O to O2| (I)| 3F
(B)| 1 mol of MnO-4 to Mn2+| (II)| 2F
(C)| 1.5 mol of Ca from molten CaCl2| (III)| 1F
(D)| 1 mol of FeO to Fe2O3| (IV)| 5F

Choose the correct answer from the options given below:

• A. A-II, B-IV, C-I, D-III
• B. A-III, B-IV, C-I, D-II
• C. A-II, B-III, C-I, D-IV
• D. A-III, B-IV, C-II, D-I

Answer 1

Answer: (A)

A-II, B-IV, C-I, D-III

Answer 2

1. For $H_2O \to O_2$, 4 electrons are needed per oxygen atom. Hence, 2 moles of $H_2O$ require 4F for 1 mole of $O_2$.
2. For $MnO_4^- \to Mn^{2+}$, 5 electrons per mole are required, so 5F.
3. For $CaCl_2$, 2 electrons are required per Ca, so 1.5 moles require 3F.
4. For $FeO \to Fe_2O_3$, 2 moles of FeO require 2F.