Which of the following is the correct order o | vedclass

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(A) The reactivity of alkylbenzenes towards electrophilic aromatic substitution depends on the electron-donating effect of the alkyl group,which occur

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$i > iv > ii > iii$

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(A) The reactivity of alkylbenzenes towards electrophilic aromatic substitution depends on the electron-donating effect of the alkyl group,which occurs via the hyperconjugation effect.Hyperconjugation is directly proportional to the number of $\alpha$-hydrogens present on the carbon atom attached to the benzene ring.Let us count the $\alpha$-hydrogens for each compound:$(i)$ Toluene $(C_6H_5-CH_3)$: $3 \ \alpha-H$(iv) Ethylbenzene $(C_6H_5-CH_2CH_3)$: $2 \ \alpha-H$(ii) Isopropylbenzene $(C_6H_5-CH(CH_3)_2)$: $1 \ \alpha-H$(iii) tert-Butylbenzene $(C_6H_5-C(CH_3)_3)$: $0 \ \alpha-H$Since the reactivity is proportional to the number of $\alpha$-hydrogens,the order is $(i) > (iv) > (ii) > (iii)$.

Which of the following is the correct order of electrophilic substitution for the given compounds?
$(i)$ Toluene
(ii) Isopropylbenzene
(iii) tert-Butylbenzene
(iv) Ethylbenzene

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Which of the following is the correct order of electrophilic substitution for the given compounds?$(i)$ Toluene(ii) Isopropylbenzene(iii) tert-Butylbenzene(iv) Ethylbenzene