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Câu hỏi: Sự sắp xếp nào theo trật tự tăng dần lực bazơ của các hợp chất sau đây đúng ?
$\eqalign{
& A.{C_2}{H_5}N{H_2} < \left({C_2}{H_5}\right)_2NH < N{H_3} < {C_6}{H_5}N{H_2} \cr
& B.{\left({C_2}{H_5}\right)_2}NH < N{H_3} < {C_6}{H_5}N{H_2} < {C_2}{H_5}N{H_2} \cr
& C.{C_6}{H_5}N{H_2} < N{H_3} < {C_2}{H_5}N{H_2} < {\left({C_2}{H_5}\right)_2}NH \cr
& D.N{H_3} < {C_2}{H_5}N{H_2} < \left({C_2}{H_5}\right)_2NH < {C_6}{H_5}N{H_2} \cr} $
$\eqalign{
& A.{C_2}{H_5}N{H_2} < \left({C_2}{H_5}\right)_2NH < N{H_3} < {C_6}{H_5}N{H_2} \cr
& B.{\left({C_2}{H_5}\right)_2}NH < N{H_3} < {C_6}{H_5}N{H_2} < {C_2}{H_5}N{H_2} \cr
& C.{C_6}{H_5}N{H_2} < N{H_3} < {C_2}{H_5}N{H_2} < {\left({C_2}{H_5}\right)_2}NH \cr
& D.N{H_3} < {C_2}{H_5}N{H_2} < \left({C_2}{H_5}\right)_2NH < {C_6}{H_5}N{H_2} \cr} $
Chọn C