Question

An amount of oxalic acid present in the solution can be oxidised by its titration with $KMn{O}_4$ solution in the presence of $H_{2}S{O}_4$. The titration gives unsatisfactory result when carried out in the presence of $HCl$, because $HCl$:

• A. oxidises oxalic acid to carbon dioxide and water
• B. gets oxidised by oxalic acid to chlorine
• C. furnishes $H^{+}$ ions in addition to those from oxalic acid
• D. reduces permanganate to $M{n}^{2+}$

Answer 1

The correct option is D reduces permanganate to $M{n}^{2+}$

$\text{HCl reduces}$ $M{n}^{7+}$ $\text{to}$ $M{n}^{2+}$$\text{ie. why}$$H_{2}S{O}_4$ $\text{is used instead of HCl.}$