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)

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$A$,$B$,$C$ 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.

Similar Questions

In the following reaction sequence, $X$ and $Z$, respectively, are:
$CH_{3}CH_{2}CH_{2}-OH + PCl_{5} \rightarrow CH_{3}CH_{2}CH_{2}Cl + X + HCl$
$CH_{3}CH_{2}CH_{2}Cl \xrightarrow{alc. KOH, \Delta} Y$
$Y \xrightarrow{HBr, (C_{6}H_{5}CO)_{2}O_{2}} Z$

The number of all types of isomers of chlorobutane $(C_4H_9Cl)$ is:

The possible products formed in the following reaction are:

In which of the following compounds does the carbon atom attached to the halogen possess $sp^2$ hybridization?

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