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. gets oxidised by oxalic acid to chlorine
B. Furnishes `H^(+)` ions in addition to those from oxalic acid
C. reduces permanganate to `Mn^(2+)`
D. oxidises oxalic acid to carbon dioxide and water

Explanation

Titration of oxalic acid by `KMnO_(4)` in the presence of HCI gives unsatisfactory result because HCI is a better reduring agent than oxalic acid and HCI rducess prefe3rably `MnO_(4)^(-)`to `Mn^(2+)`.