The correct order of basicity of amines in water is which of the following?

The correct order of basicity of amines in water is which of the following? Correct Answer (CH3)2NH > (CH3)3N > CH3NH2

Basicity of amines increase with increase in number of −CH3 groups (or any group which cause +I effect), due to increase in electron density on N atom. As a rule, the basicity of 3° amine should be more than that of 2° amine, but actually it is found to be lesser than 2° amines. This is due to more solvation by water in secondary amine. Hence the correct order of basicity is: (CH3)2NH > (CH3)3N > CH3NH2.
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