The correct order of basic nature in aqueous solution for the bases NH 3 , H 2 N - NH 2 , CH 3 CH 2 NH 2 , ( CH 3 CH 2 ) 2 NH and ( CH 3 CH 2 ) 3 N is

H 2 N - NH 2 < NH 3 < ( CH 3 CH 2 ) 3 N < CH 3 CH 2 NH 2 < ( CH 3 CH 2 ) 2 NH

NH 3 < H 2 N - NH 2 < ( CH 3 CH 2 ) 3 N < CH 3 CH 2 NH 2 < ( CH 3 CH 2 ) 2 NH

NH 3 < H 2 N - NH 2 < CH 3 CH 2 NH 2 < ( CH 3 CH 2 ) 2 NH < ( CH 3 CH 2 ) 3 N

NH 2 - NH 2 < NH 3 < CH 3 CH 2 NH 2 < ( CH 3 CH 2 ) 3 N < ( CH 3 CH 2 ) 2 NH

Chemistry · General Organic Chemistry

JEE Main 2025 — 2 April, Morning Shift — Question 3

The correct order of basic nature in aqueous solution for the bases

$\mathrm{NH}_{3}, \mathrm{H}_{2} \mathrm{~N}-\mathrm{NH}_{2}, \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{NH}_{2},\left(\mathrm{CH}_{3} \mathrm{CH}_{2}\right)_{2} \mathrm{NH}$ and $\left(\mathrm{CH}_{3} \mathrm{CH}_{2}\right)_{3} \mathrm{~N}$ is

Option A:
$\mathrm{NH}_{3}<\mathrm{H}_{2} \mathrm{~N}-\mathrm{NH}_{2}<\left(\mathrm{CH}_{3} \mathrm{CH}_{2}\right)_{3} \mathrm{~N}<\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{NH}_{2}$ $<\left(\mathrm{CH}_{3} \mathrm{CH}_{2}\right)_{2} \mathrm{NH}$
Option B:
$\mathrm{NH}_{3}<\mathrm{H}_{2} \mathrm{~N}-\mathrm{NH}_{2}<\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{NH}_{2}<$ $\left(\mathrm{CH}_{3} \mathrm{CH}_{2}\right)_{2} \mathrm{NH}<\left(\mathrm{CH}_{3} \mathrm{CH}_{2}\right)_{3} \mathrm{~N}$
Option C:
$\mathrm{NH}_{2}-\mathrm{NH}_{2}<\mathrm{NH}_{3}<\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{NH}_{2}<\left(\mathrm{CH}_{3} \mathrm{CH}_{2}\right)_{3} \mathrm{~N}$ $<\left(\mathrm{CH}_{3} \mathrm{CH}_{2}\right)_{2} \mathrm{NH}$
Option D:
$\mathrm{H}_{2} \mathrm{~N}-\mathrm{NH}_{2}<\mathrm{NH}_{3}<\left(\mathrm{CH}_{3} \mathrm{CH}_{2}\right)_{3} \mathrm{~N}<\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{NH}_{2}$ $<\left(\mathrm{CH}_{3} \mathrm{CH}_{2}\right)_{2} \mathrm{NH}$
Correct

Answer: D

Step-by-step solution

Order of basic strength of ethyl amines in water is $2^{\circ}>3^{\circ}>1^{\circ}$ . Also $\mathrm{NH}_{3}$ is more basic than

$\mathrm{H}_{2} \mathrm{~N}-\mathrm{NH}_{2}$

Answer key and solution verified before publishing.

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Exam: JEE Main 2025
Paper: 2 April, Morning Shift
Subject: Chemistry
Chapter: General Organic Chemistry
Topic: Acidic & Basic Strengths of Organic Compounds

Consider the following compound ( X ) The most stable and least stable carbon radicals, respectively, produced by homolytic cleavage of…

Answer: D

Step-by-step solution

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