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The decreasing order of basic characters...

The decreasing order of basic characters of the three amines and ammonia is

A

`NH_3 gt CH_3NH_2 gt C_2H_5NH_2 gt C_6H_5NH_2`

B

`C_2H_5NH_2 gt CH_3NH_2 gt NH_3 gt C_6H_5NH_2`

C

`C_6H_5NH_2 gt C_2H_5NH_2 gt CH_3NH_2 gt NH_3`

D

`CH_3 NH_2 gt C_2H_5NH_2 gt C_6H_5NH_2 gt NH_3`

Text Solution

Verified by Experts

The correct Answer is:
B
(i) Electron donors are bases.
(ii) Electron withdrawing groups (e.g. benzyl) decrease the basicity of amines.
(iii) Electron donating groups (e.g. alkyl) increase the acidity of amines.
`therefore` The correct order of basicity of amines is `C_2H_5NH_2 gt CH_3NH_2 gt NH_3 gt C_6H_5NH_2`
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