Question

In the structure, the number of the functional groups present is:

(A) 2
(B) 4
(C) 5
(D) 3

Answer 1

Functional group is a part of an organic compound, where the reaction takes place. The classification of organic compounds according to functional groups is very helpful to predict the behavior of organic compounds.

Complete step by step solution:
The properties of organic compounds can be predicted based on the functional group present in it. Functional group is a part on which the reaction takes place in an organic compound.
Main functional group are mentioned as follows:

S.No	Functional group	Family
1.		Alkane (${C_n}{H_{2n - 2}}$ )
2.		Alkene (${C_n}{H_{2n}}$)
3.		Alkynes (${C_n}{H_{2n - 2}}$)
4.	–OH	Alcohol (ROH)
5.	–O-	Ethers (ROR)
6.		Aldehyde (RCOOH)
7.		Ketone (RCOOR)
8.		Carboxylic acid (RCOOH)
9.	-$N{H_2}$	Amines
10.	–CN	Nitriles
11.		Amide ($RCON{H_2}$)

With reference to above information let’s spot the functional groups in the molecule:

Therefore, there are four functional groups,
1. Amide
2. Carboxylic acid
3. Alcohol
4. Nitriles
Thus, option B is the correct answer.

Note: Classification of organic compounds according to functional groups is very helpful for predicting the behaviors of large numbers of organic compounds. Depending upon the structure and molecules associated, the chemical and physical properties vary.