Question

The functional group present in carboxylic acids is?
A. -COOH
B. –CO-
C. -OH
D. -CHO

Answer 1

Hint As we know that carboxylic acid is an organic compound, that is basically consisting of a carboxyl-active functional group. It is found that these occur mostly in nature, as well as are also manufactured by humans. As we know that carboxylic acid is a living compound, consisting of a carboxyl-active group. It is found that these occur mostly in nature, and are also man-made.

Complete Step by step solution:
- It is found that the formula of carboxylic acid is R-COOH, where COOH refers to the carboxylic group. And R is the molecule that is remaining to which the rest of the group is being attached.
- We can see here that in the carboxyl group there is a carbon atom that forms a double bond with an oxygen atom as well as a single bond with a hydroxyl group.
- As we know that carboxylic acid is naturally polar due to the presence of two electronegative oxygen atoms.
- It is found that carboxylic acid contains the carbonyl and the hydroxyl group and therefore participates in hydrogen bonding.
- It is found that the boiling point of carboxylic acid is mainly higher than that of water. And again these generally have a strong sour smell.

- Hence, we can conclude that the correct option is (a), that is the functional group present in carboxylic acids is -COOH

Note:
- As we know that carboxylic acids are usually weaker acids, as in a neutral aqueous solution these are not found to fully dissociate in order to form $H^{+}$ cations.
- It is found that carboxylic acids are used widely in the manufacture of biopolymers, adhesives, polymers and are also used as food additives, solvents.