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  4. Which of the following reagents cannot be used to oxidise primary alcohols to aldehydes?

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Q. Which of the following reagents cannot be used to oxidise primary alcohols to aldehydes?

KCETKCET 2017Alcohols Phenols and Ethers

Solution:

$KMnO _{4}$ in acidic medium cannot be used $t$ oxidise primary alcohols to aldehydes because convert primary alcohols into carboxylic acid th direct oxidation of primary alcohols to carboxyli acids can be cartied out using $KMnO _{4}$.

$CH_3CH_2OH \xrightarrow[{H^+}]{K/MnO_4} CH_3COOH$