Amount of oxalic acid present in a solution can be determined by its titration with `KMnO_4` solution in the presence of `H_2SO_4`. The titration gives unsatisfactory result when carried out in the presence of `HCl`, because `HCl`

Options

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

Answer

C

Explanation

`MnO_(4)^(-)`gets easily reduced to `Mn^(2+)` in the presence of IICI, hence is not used.