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

(C H_{3})_{2} N H > C H_{3} N H_{2} > (C H_{3})_{3} N

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(C H_{3})_{3} N > C H_{3} N H_{2} > (C H_{3})_{2} N H

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(C H_{3})_{3} N > (C H_{3})_{2} N H > C H_{3} N H_{2}

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C H_{3} N H_{2} > (C H_{3})_{2} N H > (C H_{3})_{3} N

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Solution

The correct option is A $(C H_{3})_{2} N H > C H_{3} N H_{2} > (C H_{3})_{3} N$
In aqueous solution, inductive effect, solvation effect (H-bonding) and steric hindrance all together affect the basic strength of substituted amines.

Basic character:
$(C H_{3})_{2} N H > C H_{3} N H_{2} > (C H_{3})_{3} N$

$2^{0}$ $1^{0}$ $3^{0}$

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