1.

Amongst the following, the strongest base in aqueous medium is

Answer»

`CH_3 NH_2`
`NC CH_2 NH_2`
`(CH_3)_2 NH`
`C_6H_5NHCH_3`

SOLUTION :`(CH_3)_2 NH` being a `2^@`amine is more BASIC than `CH_3 NH_2(1^@ ). NC C_2 NH_2`is less basic than `CH_3 NH_2`due to-I effect of CN group. `C_6 H_5 NHCH_3` is less basic than `CH_3 NH_2` as well as `(CH_3 )_2 NH` due to delocalization of lone pair of electrons on the N-atom into thebenzene ring. Thus, `(CH_3)_2NH` is the STRONGEST BASE.


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