Which among the following statement(s) is/are correct?

Alcohols on reaction with chromic oxide give aldehydes

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Secondary alcohols give ketones when oxidised using chromic oxide

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Tertiary alcohols get oxidised on treatment with PCC

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Pyridinium chlorochromate (PCC) is a better reagent for the oxidation of primary alcohols to aldehydes

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Solution

The correct option is D Pyridinium chlorochromate (PCC) is a better reagent for the oxidation of primary alcohols to aldehydes
On reaction with chromic oxide (in anhydrous medium) primary alcohols give aldehydes and secondary alcohols give ketones.

Tertiary alcohols do not undergo oxidation.
Tertiary alcohols on treatment with strong oxidising agents such as KMnO₄may give carboxylic acids having lesser number of carbon atoms.

PCC oxidises primary alcohols into aldehydes.

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