NEET Chemistry Redox Reactions Questions Solved

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:

(a) oxidises oxalic acid to carbon dioxide and water

(b) gets oxidised by oxalic acid to chlorine

(c) furnishes H+ ions in addition to those from oxalic acid

(d) reduces permanganate to Mn2+

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