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Mark the incorrect statement (s)....

Mark the incorrect statement (s).

A

Potassium dichromate oxidises a secondary alcohol into a ketone .

B

Potassium permangante is a weaker oxidising agent than potassium dichromate.

C

Potassium dichromate oxidises a secondary alcohol into aldehyde.

D

Alkaline `KMnO_(4)` solution oxidises tertiary alcohol to a mixture of a ketone and an acid.

Text Solution

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The correct Answer is:
B, C, D
In acidie medium , ` KMnO_(4)` gives 5 oxygen while acidic ` K_(2)Cr_(2)O_(7) ` gives 3 oxygen. `K_(2)Cr_(2)O_(7)` oxidises secondary alcohols to ketones.
Tertiary alcohols are resistance to oxidation in neutral or alkaline `KMnO_(4)` solution but are readily oxidised in acidic solution ` (KMnO_(4)//H_(2)SO_(4))` to a mixture of a ketone and an acid each containing lesser number of carbon atoms than the original alcohol.
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