Ncert Exercises & Solutions

$K M n O_{4}$ acts as an oxidizing agent in an acidic medium. The number of moles of $K M n O_{4}$ that will be needed to react with one mole of sulphide ions in an acidic solution is $:$
1. $\frac{2}{5}$
2. $\frac{3}{5}$
3. $\frac{4}{5}$
4. $\frac{1}{5}$

The reaction is as follows:

$5 \mathrm{~S}^{2-}+2 \mathrm{MnO}_4^{-}+16 \mathrm{H}^{+} \longrightarrow 2 \mathrm{Mn}^{2+}+8 \mathrm{H}_2 \mathrm{O}+5 \mathrm{~S}$

5 moles of S^2- ions react with 2 moles of KMnO₄ . So, 1 mole of S^2- ion will react with $\frac{2}{5}$ moles of KMnO₄

NEET Information

courses

Company

Botany Questions

Chemistry Questions

Physics Questions

Zoology Questions