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The boiling points of amines and their corresponding alcohols and acids vary in the order

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${R C H}_{2} {N H}_{2} > R C O O H > {R C H}_{2} O H$

${R C H}_{2} {N H}_{2} < {R C H}_{2} O H < R C O O H$

${R C H}_{2} {N H}_{2} < R C O O H < {R C H}_{2} O H$

${R C H}_{2} {N H}_{2} > {R C H}_{2} O H > R C O O H$

answer is D.

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Detailed Solution

Nitrogen is less electronegative than oxygen. So, $N - H$ bond is less polar than $O - H$ bond.

Thus, alcohol and acid have more hydrogen bonding than amines.

Also, carboxylic acids have more extensive H-bonding due to its association nature.

Since, $H$ -bonding $α$ boiling point

Thus, Boiling point order will be,

${RCH}_{2} {NH}_{2} < {RCH}_{2} OH < RCOOH$

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