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AP EAMCET202421 May 2024Morning ShiftChemistryAminesActual

Arrange the following in decreasing order of their basicity

Options

  1. AB C A
  2. BB A C
  3. CA B C
  4. DA C B

Correct answer

B. B A C

Step-by-step solution

Basicity +I effect +M effect For option (B) nitrogen lone pair is not part of conjugation it is more easily available for donation so it is more basic. For option (A) OCH ₃ group is +M group which increase the basicity of nitrogen. For option (C) NO ₂ is a electron withdrawing group. It shows -M effect and pull electron from nitrogen of aniline so lone pair on nitrogen are less available for donation.

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