What is the correct order of increasing basic | vedclass

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(C) The basic strength of amines depends on the availability of the lone pair of electrons on the nitrogen atom. $1$. $NH_3$ has no alkyl group to inc

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$NH_3 < CH_3NH_2 < (CH_3)_2NH$

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(C) The basic strength of amines depends on the availability of the lone pair of electrons on the nitrogen atom. $1$. $NH_3$ has no alkyl group to increase electron density on the nitrogen atom. $2$. $CH_3NH_2$ ($1^{\circ}$ amine) has one methyl group which shows a $+I$ effect,increasing the electron density on the nitrogen atom,making it more basic than $NH_3$. $3$. $(CH_3)_2NH$ ($2^{\circ}$ amine) has two methyl groups,providing a stronger $+I$ effect than $CH_3NH_2$,further increasing the electron density on the nitrogen atom. Therefore,the correct order of increasing basic strength is $NH_3 < CH_3NH_2 < (CH_3)_2NH$.

What is the correct order of increasing basic strength for the bases $NH_3$,$CH_3NH_2$,and $(CH_3)_2NH$?

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