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Arrange the following in increasing orde...

Arrange the following in increasing order of their basic strength `CH_(3)NH_(2) (I),(CH_(2)NH (II),(CH_(3))_(3)N(III),C_(6)H_(5)CH_(2)NH_(2)(IV)` .

A

`IV lt III lt II lt I`

B

`IV lt III lt I lt II`

C

`I lt II lt III lt IV`

D

`IV lt III lt I lt II`

Text Solution

Verified by Experts

The correct Answer is:
B
Unless specified we consider the basic strenght in aqueous solution The correct order is
`C_(6)H_(5)CH_(2)NH_(2)(IV) lt(CH_(3))_(3) N (III) lt CH_(3)NH_(2) (I)`
Benzy1 amines is the weakest base on account of the -I effect of benzene ring while `(CH_(3))_(3)N` is weaker than other aliphatic amines because its conjugate acid `CH_(3))_(3)N^(+)H` is not effectively solvated .
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