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

Answer

A

Explanation

In presence of `H_(2)SO_(4), KMnO_(4)` oxidises oxalic acid to `CO_(2)` .In presence of HCl, `KMnO_(4)` not only oxidises oxalic acid but also oxidises HCl to `Cl_(2)` and itself it is reduced to `Mn^(2+)`