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Question
Chemistry
Considering the basic strength of amines in aqueous solution, which one has the smallest pKb value?
Q. Considering the basic strength of amines in aqueous solution, which one has the smallest
p
K
b
value?
2693
215
JEE Main
JEE Main 2014
Amines
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A
(
C
H
3
)
2
N
H
56%
B
C
H
3
N
H
2
15%
C
(
C
H
3
)
3
N
20%
D
C
6
H
5
N
H
2
9%
Solution:
Among
C
6
H
5
N
H
2
′
C
H
3
N
H
2
′
(
C
H
3
)
2
N
H
(
C
H
3
)
3
N
⋅
C
6
H
5
N
H
2
is least basic due to resonance
Out of
(
C
H
3
)
3
N
,
C
H
3
N
H
2
′
(
C
H
3
)
2
N
H
⋅
(
C
H
3
)
2
N
H
is most basic due to +1 effect and hydrogen bonding in
H
2
O
