Q21 / 180 · COMEDK 2017 · Chemistry

Mesomeric effect involves delocalisation of

  • Correct answer
    A
    $\pi$-electrons
  • B
    $\sigma$-electrons
  • C
    protons
  • D
    None of these

Solution

Mesomeric effect involves delocalisation of $\pi$-electrons. It can show $+M$-effect and $-M$-effect. The electron donating functional group shows $+M$-effect while electron withdrawing functional group shows - M-effect.

Hence, the correct answer is option: 'A'.

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