A) \[N{{H}_{3}}\]
B) \[C{{H}_{3}}N{{H}_{2}}\]
C) \[{{(C{{H}_{3}})}_{2}}NH\]
D) \[{{C}_{6}}{{H}_{5}}N{{(C{{H}_{3}})}_{2}}\]
Correct Answer: C
Solution :
Basicity of amines depends upon the availability of lone pair of nitrogen for donation. Electron releasing group like\[-C{{H}_{3}}\]increases the basicity of amines by increasing electron density over nitrogen, which facilitate the donation of lone pair of electrons. Electron withdrawing groups like\[-Ph\]group withdraws electrons and thus, make amines less basic by decreasing electron density over nitrogen. Hence, the order of basic nature of the given amines is \[{{(C{{H}_{3}})}_{2}}NH>{{C}_{6}}{{H}_{5}}N{{(C{{H}_{3}})}_{2}}>C{{H}_{3}}N{{H}_{2}}>N{{H}_{3}}\] Thus,\[{{(C{{H}_{3}})}_{2}}NH\]is most basic.
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