(D) The given reaction is $B^{-} + R - A \to B - R + A^{-}$.Here,$B^{-}$ acts as a nucleophile that attacks the substrate $R-A$ while the leaving grou

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Bimolecular nucleophilic substitution

(D) The given reaction is $B^{-} + R - A \to B - R + A^{-}$.Here,$B^{-}$ acts as a nucleophile that attacks the substrate $R-A$ while the leaving group $A^{-}$ departs simultaneously.This concerted mechanism,where the rate depends on the concentration of both the nucleophile and the substrate,is characteristic of a $S_N2$ (bimolecular nucleophilic substitution) reaction.

Class 11 Chemistry 8-4.Organic Chemistry : Reaction mechanism Types of organic reactions

Medium

To which of the following four types does this reaction belong: $B^{-} + R - A \to B - R + A^{-}$?

A
Unimolecular electrophilic substitution
B
Bimolecular electrophilic substitution
C
Unimolecular nucleophilic substitution
D
Bimolecular nucleophilic substitution

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Class 11 Questions

Class 11

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8-4.Organic Chemistry : Reaction mechanism

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Types of organic reactions

The major product of the above reaction is:

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The major product for the following reaction is:

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Heterolysis of $C-Cl$ bond produces:

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The enol percentage of the following compound is maximum for:

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Match Column-$I$ and Column-$II$ with the correct relation:

Column-$I$ Column-$II$

$(i)$ Substitution reaction $(p)$ $CH_2=CH_2 + Br_2 \to CH_2Br-CH_2Br$

$(ii)$ Addition reaction $(q)$ $C_6H_6 + NO_2^+ \to C_6H_5NO_2 + H^+$

$(iii)$ Electrophilic addition reaction $(r)$ $CH_3Cl + NaOH \to CH_3OH + NaCl$

$(iv)$ Electrophilic substitution reaction $(s)$ $CH_3CH_2OH \xrightarrow[\Delta]{Al_2O_3} CH_2=CH_2$

$(v)$ Elimination reaction

Column-$I$	Column-$II$
$(i)$ Substitution reaction	$(p)$ $CH_2=CH_2 + Br_2 \to CH_2Br-CH_2Br$
$(ii)$ Addition reaction	$(q)$ $C_6H_6 + NO_2^+ \to C_6H_5NO_2 + H^+$
$(iii)$ Electrophilic addition reaction	$(r)$ $CH_3Cl + NaOH \to CH_3OH + NaCl$
$(iv)$ Electrophilic substitution reaction	$(s)$ $CH_3CH_2OH \xrightarrow[\Delta]{Al_2O_3} CH_2=CH_2$
$(v)$ Elimination reaction