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The correct order of the basic strength ...

The correct order of the basic strength of methyl substituted amines in aqueous solution is

A

`CH_(3)NH_(2) gt (CH_(2))_(2)NH gt (CH_(3))_(3)N`

B

`(CH_(3))_(2)NH gt CH_(3)NH_(2) gt (CH_(3))_(3)N`

C

`(CH_(3))_(3)N gt CH_(3)NH_(2) gt (CH_(3))_(2)NH`

D

`(CH_(3))_(3) N gt (CH_(3))_(2) NH gt CH_(3)NH_(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
`K_(b)` of methyl substituted amines in aqueous solution depend upon combined effect of +I of methyl and solubility of `H_(2)O` by H- bonding and order is
`K_(b) = (CH_(3))_(2) NH gt CH_(3) - NH_(2) gt (CH_(3))_(3)N`
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