Question-17 Identify the correct decreasing order of boiling points for different organic compounds from following.
(A) Carboxylic acids > Amines > Alcohols
(B) Carboxylic acids > Alcohols > Amines
(C) Amines > Alcohols > Carboxylic acids
(D) Alcohols > Amines > Carboxylic acids
Answer : (B)
Explanation:
N – H bonds in amines are less polar than O – H bond in alcohols.
Carboxyl group (–COOH) of carboxylic acid contains O – H bond which is responsible for formation of hydrogen bonding.
Strength of hydrogen bonding in carboxylic acid is greater than that of alcohols.