Question:
When KMnO4 solution is added to the oxalic acid solution, the decolourisation is slow in the beginning but becomes instantaneous after some time because
(i) CO2 is formed as the product.
(ii) The reaction is exothermic.
(iii) MnO4– catalyses the reaction.
(iv) Mn2+ acts as an autocatalyst.
Solution:
Option (iv) Mn2+ acts as an autocatalyst is the answer.
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