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JEE Main 20198 AprilMorning Shift

Exam: JEE Main
Year: 2019
Date: 8 April
Shift: Morning Shift
Subject: Chemistry
Chapter: Amines

JEE Main 2019 · 8 April · Morning Shift · Chemistry · Amines

In the following compounds, the decreasing order of basic strength...

In the following compounds, the decreasing order of basic strength will be:

Options

A ${C}_{2}{H}_{5}N{H}_{2} > N{H}_{3} > {( {C}_{2}{H}_{5} )}_{2}NH$
B $( {C}_{2}{H}_{5} ) NH > N{H}_{3} > {C}_{2}{H}_{5}N{H}_{2}$
C $N{H}_{3} > {C}_{2}{H}_{5}N{H}_{2} > {( {C}_{2}{H}_{5} )}_{2}NH$
D ${( {C}_{2}{H}_{5} )}_{2}NH > {C}_{2}{H}_{5}N{H}_{2} > N{H}_{3}$

Correct answer

D. ${( {C}_{2}{H}_{5} )}_{2}NH > {C}_{2}{H}_{5}N{H}_{2} > N{H}_{3}$

Step-by-step solution

Basic character

∝ + I

effect

- {CH}_{2}{CH}_{3}

exert

+ I

effect so, more the number of

- {CH}_{2}{CH}_{3}

groups more is the basic character.

N{H}_{3} < \mathop{C{H}_{3}C{H}_{2}N{H}_{2}}_{{1}^{o}\text{Amine}} < \mathop{{( C{H}_{3}C{H}_{2} )}_{2}NH}_{{2}^{o}\text{Amine}}

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