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

Answer

A

Explanation

`KMnO_4` can oxidise HCI also (along with `H_2C_2O_4`) into `Cl_2` and itself gets reduced to `Mn^(2+)`