Question

Arrange the following in decreasing order of their basic strength:

C₆H₅NH₂, C₂H₅NH₂, (C₂H₅)₂NH₂, NH₃

विकल्प

• NH₃ > C₆H₅NH₂ ​​​​​​> C₂H₅NH₂ > (C₂H₅)₂NH₂

• (C₂H₅)₂ NH ₂ > C₂H₅NH₂ > NH₃ > C₆H₅NH₂

• C₂H₅NH₂ > (C₂H₅)₂ NH ₂ > NH₃ > C₆H₅NH₂

• C₆H₅NH₂ > C₂H₅NH₂ > (C₂H₅)₂NH₂ > NH₃

Answer 1

(C₂H₅)₂ NH ₂ > C₂H₅NH₂ > NH₃ > C₆H₅NH₂

Explanation:

Alkyl amines and ammonia are more basic than aniline because in aniline lone pair on N is in resonance with benzene ring so is less available.

Also, secondary alkyl amines are more basic than primary amine and ammonia due to +I effect of the alkyl group which increases basicity.