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. furnished `H^(+)` ions in addition to those from oxalic acid
C. reduces permanganate to `Mn^(2+)`
D. Oxidation oxalic acid to carbon dioxide and water

Answer

C

Explanation

(c ) The titration of oxalic acid with `KMnO_(4)` is presence of HCl gives unsatisfactory result because of the fact that `KMnO_(4)` can also oxidise HCl along with oxalic acid. HCl on oxidation gives `Cl_(2)` and HCl reduces `KMnO_(4)` to `Mn^(2+)` thus the correct answer is `(c )`