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Question

Which of the following will show a ‘+M’ effect (positive mesomeric effect)
(i) CH3    (ii) Cl   (iii) NH2    (iv) OH
(v) OCH3
    (vi) C=O  (vii) CN
  1. i, ii, iii
  2. ii, iii, iv, v, vi
  3. ii, iii, iv, v
  4. ii, iii, iv


Solution

The correct option is C ii, iii, iv, v
A directly attached atom having a lone pair will show + M effect.

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