Question

$KMnO_{4}$ acts as an oxidizing agent in acidic medium. The number of moles of $KMnO_{4}$ that will be needed to react with one mole of sulphide ions in acidic solution is

• A. $\frac{2}{5}$
• B. $\frac{3}{5}$
• C. $\frac{4}{5}$
• D. $\frac{1}{5}$

Answer 1

Answer: (A)

$\frac{2}{5}$

Answer 2

$2MnO_{4}^{-} + 5S^{2 -} + 16H^{+} \rightarrow 2Mn^{2 +} + 8H_{2}O + 5S$