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Why are boiling of aldehydes and ketones...

Why are boiling of aldehydes and ketones lower than those of the corresponding acids ?

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In the carboxylic acids, the carboxyl group are involved in the intermolecular hydrogen bonding. However, it is absent in the aldehydes and ketones. Therefore, aldehydes and ketones have lower boiling points than the corresponding acids of comparable molecular mass.
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(a) Why are the boiling points of carboxlic acids higher than those of the corresponding alcohols ? (b ) Define the following terms and write reaction involved in it : ( i) Reimer - Tiemann reaction (ii ) Rosenmund's reduction reaction

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