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Amount of oxalic acid present in a solut...

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

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.

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