Question
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.
Answer :
$$M{n^{2 + }}$$ acts as autocatalyst.
Solution :
Little bit acid is required for reaction
$$\therefore \,\,M{n^{2 + }}$$ acts as autocatalyst.