Question

The functional group present in ethanol and methanoic acid is:

• A. $-COOH,-OH$
• B. $-OH,-COOH$
• C. $-CHO,-COOH$
• D. $-OH,-CHO$

Answer 1

The correct option is B

$-\mathrm{OH},-\mathrm{COOH}$

A functional group is defined as a group of atoms that exist in a molecule and describes the characteristics of reactions of organic compounds is called a functional group.

(b) Ethanol (${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}$) is an organic compound and it belongs to alcohol whose functional group is $-\mathrm{OH}$.

Methanoic acid ($\mathrm{HCOOH}$) is an organic compound and it belongs to carboxylic acid whose functional group is $-\mathrm{COOH}$.

(a) $-\mathrm{COOH}$ is the functional group of carboxylic acid, but first compound must be alcohol.

$-\mathrm{OH}$ is the functional group of alcohol, but second compound must be carboxylic acid.

(c) $-\mathrm{CHO}$ is the functional group of aldehyde, but first compound must be alcohol.

$-\mathrm{COOH}$ is the functional group of carboxylic acid.

(d) $-\mathrm{OH}$ is the functional group of alcohol.

$-\mathrm{CHO}$ is the functional group of aldehyde, but second compound must be carboxylic acid.

Hence, Option B is the correct answer.