Question

Assertion (A) Order of basicity of amines in gaseous phase is $NH _{3}>$ primary amine $>$ secondary amine $>$ tertiary amine.
Reason (R) In gaseous phase the basic nature of aliphatic amine increases with the increase in number of alkyl groups.

• A. Both $A$ and $R$ are correct; $R$ is the correct explanation of $A$
• B. Both $A$ and $R$ are correct; $R$ is not the correct explanation of $A$
• C. $A$ is correct; $R$ is incorrect
• D. $R$ is correct; $A$ is incorrect

Answer 1

Answer: (D)

Order of basicity of amines in gaseous phase follows the order: Tertiary amine $>$ secondary amine $>$ primary amine $> NH _{3}$ The basic nature of aliphatic amines increases with increase in the number of alkyl groups (in gaseous phase).