1.

Which of the following reagents cannot be used to oxidize primary alcohols to aldehydes?

Answer»

CRO3 in ANHYDROUS medium
Pyridinium chlorochromate
`KMnO_(4)` in ACIDIC medium
Heating in PRESENCE of Cu at 573 K

Solution :PRIMARY alcohols can be oxidised to aldehydes with `KMnO_(4)` in aqucous or alkaline medium. Acidified `KMnO_(4)` oxidises alcohols to carboxylic acids directly.


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