Identify the correct order of reactivity for | vedclass

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(B) All the given orders are correct:$(A)$ $S_{N}2$ reaction rate decreases with increase in steric hindrance. Primary alkyl halide (isobutyl bromide)

Vedclass · Accepted Answer

$A$,$B$,$C$ and $D$

Vedclass · Answer

(B) All the given orders are correct:$(A)$ $S_{N}2$ reaction rate decreases with increase in steric hindrance. Primary alkyl halide (isobutyl bromide) is more reactive than tertiary alkyl halide (tert-butyl bromide).$(B)$ $S_{N}1$ reaction rate depends on the stability of the carbocation. Benzyl carbocation is resonance stabilized,whereas the carbocation from $2-$phenylethyl bromide is less stable.$(C)$ Electrophilic aromatic substitution $(EAS)$ rate decreases with a decrease in electron density on the ring. The $-NO_2$ group is strongly electron-withdrawing,reducing the electron density of the ring in $1-$chloro$-4-$nitrobenzene compared to chlorobenzene.$(D)$ Nucleophilic aromatic substitution rate increases with the presence of electron-withdrawing groups at ortho and para positions. The $-NO_2$ group at the para position activates the ring towards nucleophilic substitution.

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