Question

In the reaction of oxalate with permanganate in acidic medium, the number of electron involved in producing one molecule of CO₂ is:
1. 2
2. 5
3. 1
4. 10

Answer 1

Correct Answer - Option 3 : 1

Concept:

Reaction of oxalate with permanganate in acidic medium. 

\(5{{\text{C}}_{2}}\text{O}_{4}^{2-}+2\text{MnO}_{4}^{-}\to 10\text{C}{{\text{O}}_{2}}+2\text{M}{{\text{n}}^{2+}}+8{{\text{H}}_{2}}\text{O}\)

N-factor (4 – 3) × 2 = 2 (7 – 2) = 5

Number of mole 5 2 10

⇒ \(5{{C}_{2}}~O_{4}^{2-}\) Ions transfer 10e^- to produce 10 molecules of CO₂.

So, number of electrons involved in producing10 molecules of CO₂ is 10. Thus, number of electrons involved in producing 1 molecule of CO₂ is 1.