The correct order of reactivity towards Elect | vedclass

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(B) Reactivity towards $E.S.R.$ depends on the electron density of the benzene ring. Electron Donating Groups $(EDG)$ increase reactivity,while Electr

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$ii > i > iii > iv$

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(B) Reactivity towards $E.S.R.$ depends on the electron density of the benzene ring. Electron Donating Groups $(EDG)$ increase reactivity,while Electron Withdrawing Groups $(EWG)$ decrease it.$(i)$ Toluene: Contains a $-CH_3$ group,which is a weak $EDG$ ($+I$ and hyperconjugation).(ii) $m$-Methoxytoluene: Contains a $-OCH_3$ group (strong $EDG$ via $+M$) and a $-CH_3$ group (weak $EDG$). This is the most reactive.(iii) Benzaldehyde: Contains a $-CHO$ group,which is a strong $EWG$ ($-M$ and $-I$).(iv) $p$-Nitrobenzaldehyde: Contains both $-CHO$ and $-NO_2$ groups,both of which are strong $EWG$s. This is the least reactive.Thus,the order of reactivity is $(ii) > (i) > (iii) > (iv)$.

The correct order of reactivity towards Electrophilic Substitution Reaction $(E.S.R.)$ for the following compounds is:
$(i)$ Toluene
(ii) $m$-Methoxytoluene
(iii) Benzaldehyde
(iv) $p$-Nitrobenzaldehyde

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The correct order of reactivity towards Electrophilic Substitution Reaction $(E.S.R.)$ for the following compounds is:$(i)$ Toluene(ii) $m$-Methoxytoluene(iii) Benzaldehyde(iv) $p$-Nitrobenzaldehyde