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(B) The reactivity towards electrophilic aromatic substitution (like nitration) depends on the electron density of the benzene ring.$1$. $-NO_2$ (in $

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$D < B < E < A < C$

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(B) The reactivity towards electrophilic aromatic substitution (like nitration) depends on the electron density of the benzene ring.$1$. $-NO_2$ (in $D$) is a strongly electron-withdrawing group (deactivating),making the ring least reactive.$2$. $-Br$ (in $B$) is an electron-withdrawing group due to the inductive effect (deactivating),but less so than $-NO_2$.$3$. $E$ (benzene) is the reference point.$4$. $-CH_3$ groups are electron-donating (activating) due to hyperconjugation and inductive effects.$5$. $p$-xylene $(A)$ has two $-CH_3$ groups,and mesitylene $(C)$ has three $-CH_3$ groups. More electron-donating groups increase the reactivity further.Thus,the order of increasing reactivity is: $D < B < E < A < C$.

Arrange the following in increasing order of reactivity towards nitration:
$A$. $p$-xylene
$B$. bromobenzene
$C$. mesitylene
$D$. nitrobenzene
$E$. benzene
Choose the correct answer from the options given below.

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Arrange the following in increasing order of reactivity towards nitration:$A$. $p$-xylene$B$. bromobenzene$C$. mesitylene$D$. nitrobenzene$E$. benzeneChoose the correct answer from the options given below.