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JEE Main & Advanced AIEEE Solved Paper-2008

  • question_answer
    Amount of oxalic acid present in a solution can be determined by its titration with \[KMn{{O}_{4}}\] solution in the presence of \[{{H}_{2}}S{{O}_{4}}\]. The titration gives unsatisfactory result when carried out in the presence of HCl, because HCl       AIEEE  Solved  Paper-2007

    A) reduces permanganate to \[M{{n}^{2+}}\].

    B) oxidises oxalic acid to carbon dioxide and water.

    C) gets oxidised by oxalic acid to chlorine.

    D) furnishes \[{{H}^{+}}\] ions in addition to those from oxalic acid.

    Correct Answer: A

    Solution :

                    \[KMn{{O}_{4}}\] can oxidise HCl also (along with\[{{H}_{2}}{{C}_{2}}{{O}_{4}}\]) into \[C{{l}_{2}}\] and itself gets reduced to\[M{{n}^{2+}}\].


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