Ncert Exercises & Solutions

Select the correct option based on statements below:

Assertion (A):	N-ethylbenzene sulphonamide is soluble in alkali.
Reason (R):	The hydrogen attached to nitrogen in sulphonamide is strongly acidic.

1.	Both (A) and (R) are true and (R) is the correct explanation of (A).
2.	Both (A) and (R) are true but (R) is not the correct explanation of (A).
3.	(A) is true but (R) is false.
4.	(A) is false but (R) is true.

Hint: Primary amines form soluble compounds with benzene sulphonyl chloride.

Explanation:

The structure of N-ethylbenzene sulphonamide is as follows:

N-ethylbenzene is soluble in alkali because hydrogen attached to nitrogen in sulphonamide is strongly acidic and forms a salt during the reaction.

The reaction is as follows:

Thus, option 1 is the correct answer.