A) Potassium permanganate is a powerful oxidising substance
B) Potassium permanganate is a weaker oxidising substance than potassium dichromate
C) Potassium permanganate is a stronger oxidising substance than potassium dichromate
D) Potassium dichromate oxidises a secondary alcohol into a ketone
Correct Answer: B
Solution :
In acidic medium, \[KMn{{O}_{4}}\] gives 5 oxygen while acidic \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] gives 3 oxygen.
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