Question

Match List I with List II

LIST I (Amines)		LIST II (pKb​)
A	Aniline	I	3.25
B	Ethanamine	II	3.00
C	N-Ethylethanamine	III	9.38
D	N, N-Diethylethanamine	IV	3.29

 Choose the correct answer from the options given below:

• A. A-III, B-IV, C-II, D-I
• B. A-III, B-II, C-IV, D-I
• C. A-I, B-IV, C-II, D-III
• D. A-III, B-II, C-I, D-IV

Answer 1

The Correct Option is A

The correct answer is (A) :  A-III, B-IV, C-II, D-I

Amines are organic compounds that contain a nitrogen atom bonded to one or more alkyl or aryl groups. They are weak bases and react with acids to form salts. 
The strength of a base is measured by its pKb value, which is the negative logarithm of its base dissociation constant (Kb). The higher the pKb value, the weaker the base.
List I contains the names of different amines, while List II contains their respective pKb values. 
To match the amines with their correct pKb values, we need to compare their structures and the effects of the different alkyl or aryl groups attached to the nitrogen atom on their basicity.

Answer 2

The problem presents two lists: List I contains four amines (Aniline, Ethylamine, N-Ethylethanamine, and N,N-Diethylethanamine),
and List II contains four pKb values (3.25, 3.00, 9.38, and 3.29).
The task is to match each amine in List I with its corresponding pKb value in List II.
The correct matching is as follows:
Aniline (A) corresponds to 9.38 (III),
Ethylamine (B) corresponds to 3.29 (IV),
N-Ethylethanamine (C) corresponds to 3.00 (II),
and N,N-Diethylethanamine (D) corresponds to 3.25 (I).
This matching indicates the basicity of the amines, where lower pKb values signify stronger bases.
The correct answer, therefore, is option (4): A-III, B-IV, C-II, D-I.