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Tardigrade
Question
Chemistry
Point out the correct decreasing order of p Kb values of following amines C 2 H 5 NH 2, C 6 H 5 NHCH 3,( C 2 H 5)2 NH and C 6 H 5 NH 2
Q. Point out the correct decreasing order of
p
K
b
values of following amines
C
2
H
5
N
H
2
,
C
6
H
5
N
H
C
H
3
,
(
C
2
H
5
)
2
N
H
and
C
6
H
5
N
H
2
1417
189
AIIMS
AIIMS 2015
Report Error
A
(
C
2
H
5
)
2
N
H
>
C
2
H
5
N
H
2
>
C
6
H
5
N
H
C
H
3
>
C
6
H
5
N
H
2
B
(
C
2
H
5
)
2
N
H
>
C
6
H
5
N
H
C
H
3
>
C
6
H
5
N
H
2
>
C
2
H
5
N
H
2
C
C
6
H
5
N
H
2
>
C
6
H
5
N
H
C
H
3
>
(
C
2
H
5
)
2
N
H
>
C
2
H
5
N
H
2
D
C
2
H
5
N
H
2
>
(
C
2
H
5
)
2
N
H
>
C
6
H
5
N
H
C
H
3
>
C
6
H
5
N
H
2
Solution:
Order of
p
K
b
values
C
6
H
5
N
H
2
>
C
6
H
5
N
H
C
H
3
>
(
C
2
H
5
)
2
N
H
>
C
2
H
5
N
H
2
This is simply because
+
I
-effect of
C
2
H
5
group increases the basicity of amine while
−
I
-effect of
C
6
H
5
group decreases the basicity of amine.