Amount of oxalic acid present in a solution can be determined by its titration with `KMnO_(4)` solution in the presence of `H_(2)SO_(4)`. The titration gives unsatisfactory result when carried out in the presence of HCl because HCl

Options

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 permangante to `Mn^(2+)`

Answer

D

Explanation

`KMnO_(4)` oxidise HCl to `Cl_(2)` and is reduced to `Mn^(2+)`. Therefore , actual amount of oxalic acid in sloution cannot be determined.