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Q.

Which of the statements is not correct?

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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

answer is B.

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Detailed Solution

In acidic medium, KMnO4 gives 5 oxygen atoms while acidic K2Cr2O7 gives 3 oxygen atoms.
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