Identify the correct order of reactivity in electrophilic substitution reaction of the following compounds
1. Benzene, 2. Toluene, 3. Chlorobenzene, 4. Nitrobenzene

(1) > (2) > (3) > (4)

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(4) > (3) > (2) > (1)

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(2) > (1) > (3) > (4)

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(2) > (3) > (1) > (4)

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Solution

The correct option is B (2) > (1) > (3) > (4)
Electron donating group (EDG) increases the reactivity of electrophilic substitution reaction and electron withdrawing group (EWG) decreases it.

(2) $P h - C H_{3}$ ( $+ I$ and $H . C$ effect )> (1) Benzene > (3) $P h C l$ [ $- I$ effect of $(C l)$ group ]> $P h N O_{2}$ [ $- I$ and $- R$ effect of ( $- N O_{2}$ ) group ]

So the answer is option $(C)$ .

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Identify the correct order of reactivity in electrophilic substitution reaction of the following compounds 1. Benzene, 2. Toluene, 3. Chlorobenzene, 4. Nitrobenzene

Identify the correct order of reactivity in electrophilic substitution reaction of the following compounds
1. Benzene, 2. Toluene, 3. Chlorobenzene, 4. Nitrobenzene