Question

The functional group —COOH is found in

(1) esters (3) alcohols
(2) aldehydes (4) organic acids

Answer 1

#2 is the correct answer

Step-by-step explanation:

because aldehydes are -COOH

Answer 2

Answer: Option (2) is the correct answer.

Step-by-step explanation:

When for a particular compound a group of atoms shows certain characteristics reactions then that group is known as functional group.

Functional group of esters is "-COO".

Functional group of alcohols is "-OH".

Functional group of aldehydes is "-COOH".

Organic acids are the compounds that show acidic properties. Like
`-SO_(3)H`, -COOH etc.

Thus, we can conclude that the functional group —COOH is found in aldehydes.