Q91 / 197 · NEET 2009 (Mains) · Chemistry

Which of the following reactions is an example of nucleophilic substitution reaction?

  • A
    $\mathrm{RX}+\mathrm{Mg} \rightarrow \mathrm{RMgX}$
  • Correct answer
    B
    $\mathrm{RX}+\mathrm{KOH} \rightarrow \mathrm{ROH}+\mathrm{KX}$
  • C
    $2 \mathrm{RX}+2 \mathrm{Na} \rightarrow \mathrm{R}-\mathrm{R}+2 \mathrm{NaX}$
  • D
    $\mathrm{RX}+\mathrm{H}_2 \rightarrow \mathrm{RH}+\mathrm{HX}$

Solution

$\mathrm{R}-\mathrm{X}+\mathrm{KOH} \rightarrow \mathrm{R}-\mathrm{OH}+\mathrm{KX}$ $\mathrm{X}-$ replaced by $\mathrm{OH}-$ show nucleophilic substitution reaction

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

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