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Question

Estimation of oxalic acid by KMnO4 in the presence of H2SO4 can be made but not in the presence of HCl, the above estimation cannot be made because, HCl :

A
oxidizes oxalic acid to CO2 and H2O
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B
is reduced to Cl2 by oxalic acid
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C
furnishes H+ in addition to H2C2O4
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D
is oxidized to Cl2 by KMnO4
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