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9. Amines — Chemistry STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceChemistry9. Amines1 Mark
MCQ
In the following compounds, the decreasing order of basic strength will be
  • A
    $C_2H_5NH_2 > NH_3 > (C_2H_5)_2\, NH$
  • B
    $NH_3 > C_2H_5 NH_2 > (C_2H_5)_2\, NH$
  • ✓
    $(C_2H_ 5)_2 NH > C_2H_5NH_2 > NH_3$
  • D
    $(C_2H_ 5)_2 NH > NH_3 >C_2H_5 NH_2$
✓

Answer

Correct option: C.
$(C_2H_ 5)_2 NH > C_2H_5NH_2 > NH_3$
c
Basic strength order
$(CH_3CH_2)_2NH > CH_3CH_2NH_2 > NH_3$
More the number of $+I$ groups, higher is the basic strength.

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