• question_answer Which of the following reactions is an example of nucleophilic substitution reaction? [AIPMT (S) 2009] A) $240\,\Omega$ B) $15\,\Omega$ C) ${{T}_{1}}$ D) ${{T}_{2}}({{T}_{1}}>{{T}_{2}}).$

 [a] Key Idea Nucleophilic substitution reactions involve substitution (replacement) of a group or atom by a nucleophile. $V=-{{x}^{2}}y-x{{z}^{3}}+4$ $\overrightarrow{E}$ Nucleophiles are either negative charge or lone pair of electrons bearing species, e,$\overrightarrow{E}=\hat{i}(2xy+{{z}^{3}})+\hat{j}{{x}^{2}}+\hat{k}3x{{z}^{2}}$etc.