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JEE Main Chemistry question

ChemistryRedox ReactionsJEE Main

Amount of oxalic acid present in a solution can be determined by its titration with KMnO solution in the presence of HSO. The titration gives unsatisfactory result when carried out in the presence of HCl because HCl [AIEEE 2008]

Answer: (C)

Solution

HCl itself is oxidised by KMnO (to Cl), consuming extra permanganate beyond what reacts with the oxalic acid, i.e. HCl additionally reduces permanganate to Mn, giving a

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Question ID VK-130549