JEE Chemistry 2023 Question with Solution

Given: List I contains different amines and List II contains their $\text{p}K_b$ values.

Find: The correct matching between the amines and their $\text{p}K_b$ values.

The solution states that the correct matching is:

So the compounds match as follows:

• A. Aniline $\rightarrow$ III. $9.38$
• B. Ethylamine $\rightarrow$ IV. $3.29$
• C. N-Ethylethanamine $\rightarrow$ II. $3.00$
• D. N,N-Diethylethanamine $\rightarrow$ I. $3.25$

Since the options are labeled A, B, C, D in the output, this matching corresponds to option text A-I, B-IV, C-II, D-III? No. The exact matching A-III, B-IV, C-II, D-I is present as option D in the options list.

Therefore, the correct option by matching is D. The solution incorrectly labels it as option A, but its written matching clearly corresponds to option D.

Given:

• Aniline (A) corresponds to III
• Ethylamine (B) corresponds to IV
• N-Ethylethanamine (C) corresponds to II
• N,N-Diethylethanamine (D) corresponds to I

Find: Which listed option reproduces this exact order.

Compare the options one by one:

1. A: A-I, B-IV, C-II, D-III $\rightarrow$ does not match
2. B: A-III, B-II, C-I, D-IV $\rightarrow$ does not match
3. C: A-III, B-II, C-IV, D-I $\rightarrow$ does not match
4. D: A-III, B-IV, C-II, D-I $\rightarrow$ matches exactly

Therefore, the correct option is D.