Which of the following orders is correct?

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(D) Let's analyze each reaction order:$(a)$ Rate of Electrophilic Substitution Reaction $(ESR)$: The rate depends on the electron density of the ring.

Vedclass · Accepted Answer

$a, b, c, d$

Vedclass · Answer

(D) Let's analyze each reaction order:$(a)$ Rate of Electrophilic Substitution Reaction $(ESR)$: The rate depends on the electron density of the ring. $-OH$ is a stronger activating group than $-OCH_3$,which is stronger than $-CH_3$. Thus,the order is correct.$(b)$ Rate of Nucleophilic Addition Reaction $(NAR)$: The rate depends on the electrophilicity of the carbonyl carbon. Steric hindrance and electron-donating groups decrease the rate. $HCHO > PhCHO > CH_3COCH_3 > PhCOPh$. This order is correct.$(c)$ Rate of Electrophilic Addition Reaction $(EAR)$: The rate depends on the stability of the carbocation intermediate. The $MeO-$ group attached directly to the double bond provides strong resonance stabilization ($+M$ effect),making it the fastest. The order is correct.$(d)$ Rate of Electrophilic Addition Reaction $(EAR)$: The rate depends on the stability of the carbocation. $CH_3-CH=CH_2$ (carbocation stabilized by $+I$ effect) $> CH_2=CH_2 > CH_2=CH-Cl$ (carbocation destabilized by $-I$ effect of $Cl$). This order is correct.Since all orders $(a, b, c, d)$ are correct,the correct option is $D$.

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