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 permangante to `Mn^(2+)`
D. oxidises oxalic acid to carbon dioxide and water

Answer

C

Explanation

`HCl` being stronger reducing agent it reduces `MnO_(4)^(-)` to `Mn^(2+)` and result of titration become unsatisfactory.