A) \[{{(C{{H}_{3}})}_{2}}NH>C{{H}_{3}}N{{H}_{2}}>{{(C{{H}_{3}})}_{3}}N\]
B) \[{{(C{{H}_{3}})}_{3}}N>{{(C{{H}_{3}})}_{2}}NH>C{{H}_{3}}N{{H}_{2}}\]
C) \[{{(C{{H}_{3}})}_{3}}N>C{{H}_{3}}N{{H}_{2}}={{(C{{H}_{3}})}_{2}}NH\]
D) \[{{(C{{H}_{3}})}_{2}}NH>{{(C{{H}_{3}})}_{3}}N>C{{H}_{3}}N{{H}_{2}}\]
Correct Answer: A
Solution :
The order of base strength of amines in aqueous solution is as: \[{{(C{{H}_{3}})}_{2}}NH>C{{H}_{3}}N{{H}_{2}}>{{(C{{H}_{3}})}_{3}}N\] Tertiary amine is less basic than primary and secondary amine due to steric effect of three methyl group present on nitrogen atom.
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