Question

Monocarboxylic acids are functional isomers of:

• A. Ethers
• B. Amines
• C. Esters
• D. Alcohols

Answer 1

The Correct Option is C

To determine the correct functional isomer for monocarboxylic acids, we need to understand the concept of functional isomerism. Functional isomerism occurs when compounds have the same molecular formula but different functional groups.

Monocarboxylic acids contain the carboxyl group -COOH. To find their functional isomers, we need to consider which of the given options could share the same molecular formula. Let's analyze each option:

1. Ethers: Ethers have the functional group -O-. They have a different molecular structure compared to carboxylic acids, and thus are not functional isomers.
2. Amines: Amines contain the functional group -NH_2, which is not structurally similar to carboxylic acids. Therefore, they are not functional isomers.
3. Esters: Esters have the functional group -COOR, where R is an alkyl group. Esters share the same molecular formula as monocarboxylic acids but differ in their functional groups. For example, ethanoic acid C_2H_4O_2 and methyl formate (an ester) with the same molecular formula are functional isomers.
4. Alcohols: Alcohols have the functional group -OH, which cannot be isomers of carboxylic acids due to different numbers and arrangements of oxygen atoms.

Therefore, the correct answer is that monocarboxylic acids are functional isomers of Esters.