1.

Amount of oxalic acid present in a solution can be determined by its titration with KMnO_(4) solution in the presence of H_(2)SO_(4) . The titration gives unsatisfactory result when carried out in the presence of HCl because HCl:

Answer»

oxidises OXALIC acid to carbon dioxide and water
reduces PERMANGANATE to `Mn^(2+)`
GETS oxidised by oxalic acid to chlorine
furnishes `H^(+)` ions in ADDITION to those from oxalic acid.

Answer :B


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