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Q.

Amount of oxalic acid present in a solution can be determined by its titration with KMnO4 solution in the presence of H2SO4.The titration gives unsatisfactory result when carried out in the presence of HCl, because HCl

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a

Reduces permanganate to Mn+2

b

Oxidizes 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 is B.

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Detailed Solution

Oxalic acid will be oxidized, in presence of H2SO4only, not in presence of HCl, because HCl gets oxidized to Cl2 with KMnO4

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