Question

Which of the following is an organic acid? CH3COOH C2H6O CH2O CH4

Answer 1

Answer : The correct option is, $CH_3COOH$

Explanation :

Organic acid : It is an organic compound that has acidic properties.

The common organic acid is the carboxylic acid. The acidity of carboxylic acid  is associated with their carboxyl group (-COOH).

(a) $CH_3COOH$ :

It belongs to carboxylic acid functional group in which the the $-COOH$ group is directly attached to the $CH_3$ alkyl group.

(b) $CH_2O\text{ or }HCHO$ :

It belongs to an aldehyde functional group in which the the $-CHO$ group is directly attached to the hydrogen.

(c) $C_2H_6O\text{ or }C_2H_5OH$ :

It belongs to an alcoholic functional group in which the the $-OH$ group is directly attached to the $C_2H_5$ alkyl group.

(d) $CH_4$ : It is a methane molecule.

Hence, an organic acid is $CH_3COOH$

Answer 2

C) CH20

Hope this helped