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

R X + M g \to R M g X

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R X + K O H \to R O H + K X

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2 R X + 2 N a \to R R + 2 N a X

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R X + H_{2} \to R H + H X

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Solution

The correct option is B $R X + K O H \to R O H + K X$
$R X + K O H \to R O H + K X$
Nucleophilic substitution reaction involve replacement of a group or atom by a nucleophilic
$K O H \to K^{+} + O H^{-}, R X + O H^{-} \to R - O H + K X$
Nucleophile are either negative charge or a lone pair of $e^{-}$ bearing species, $O H^{-}$ etc.

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