Question

Estimation of oxalic acid by $KMn{O}_4$ in the presence of $H_{2}S{O}_4$ can be made but not in the presence of $HCl$, the above estimation cannot be made because, $HCl$ :

• A. oxidizes oxalic acid to $C{O}_2$ and $H_{2}O$
• B. is reduced to $C{l}_2$ by oxalic acid
• C. furnishes $H^{+}$ in addition to $H_2{C}_2{O}_4$
• D. is oxidized to $C{l}_2$ by $KMn{O}_4$

Answer 1

The correct option is D is oxidized to $C{l}_2$ by $KMn{O}_4$

In presence of $HCl$, the following reaction occurs;
$2KMn{O}_4+16HCl\to 2KCl+2MnC{l}_2+8H_{2}O+5C{l}_2$
$HCl$ is oxidised to $C{l}_2$ by $KMn{O}_4$.