Question

Name the functional group present in the following compounds: (a)CH3COOH (b)CH3COCH3 (c)CH3CH2OH (d)CH3CH2CHO

Answer 1

(a) $\bold{\mathrm{CH}_{3} \mathrm{COOH}}$ - Carboxylic acid

(b) $\bold{\mathrm{CH}_{3} \mathrm{COCH}_{3}}$ - Ketone

(c) $\bold{\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH}}$ - Alcohol

(d) $\bold{\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CHO}}$ - Aldehyde

Explanation:

• Whenever a specific sequence of atoms are added to an organic compound it is known as a functional group. The function group C = O is known as the ketone functional group.  

• If the functional group consists of OH - C = O, it is known as carboxylic acid. When the functional group is CH = O, it is known as the aldehyde functional group.  

• The difference between aldehyde and ketone is that aldehyde stay in the end of the chain whereas ketone stay elsewhere. When the functional group has -OH bond it is known as alcohol.

Answer 2

Functional Group

Explanation:

(a) CH3COOH - Carboxylic acid

(b)  CH3COCH3 - Ketone

(c)  CH3CH2OH - Alcohol

(d)  CH3CH2CHO - Aldehyde

A function group refers to a group of atoms responsible for the characteristic reactions of a particular compound. It is a specific sequence of atom that will get added to an organic compound.

1. If the functional group of a compound is OH - C = O, then it is called carboxylic acid.
2. If the function group of a compound is C = O, then it is known as ketones.
3. If the functional group is CH = O, it is known as aldehydes. Aldehydes always stay at the end of the chain, while ketone can attach anywhere.
4. If the functional group has an -OH bond, then it is called alcohol.