When `KMnO_(4)` solution is added to hot oxalic acid solution the decoloursitation is slow in the beginning but becomes instantaneous after some time. This is because
A. `Mn^(2+)` acts as auto catalyst
B. `CO_(2)` is formed
C. reaction is exothermic
D. `MnO_(4)^(-)` catalyses the reaction

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1 Answers

Correct Answer - A
`(NH_(4))_(2)Cr_(2)O_(7)overset(Delta)(rarr)Cr_(2)O_(3)`

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