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NEET Chemistry The d-and f-Block Elements / d तथा f ब्लॉक के तत्व Question Bank Self Evaluation Test - The d-and f-Block Elements

  • question_answer
    When \[KMn{{O}_{4}}\] is added to oxalic acid, the decolourisation is slow in the beginning but becomes instantaneous after sometime because

    A) \[M{{n}^{2+}}\] acts as autocatalyst.

    B) \[C{{O}_{2}}\] is formed as the product.

    C) Reaction is exothermic.

    D) \[MnO_{4}^{-}\] catalyses the reaction.

    Correct Answer: A

    Solution :

    [a] Little bit acid is required for reaction \[\therefore M{{n}^{2+}}\] acts as autocatalyst.


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