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Question

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

A
(1) > (2) > (3) > (4)
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B
(4) > (3) > (2) > (1)
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C
(2) > (1) > (3) > (4)
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D
(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) PhCH3 (+I and H.C effect )> (1) Benzene > (3) PhCl [I effect of (Cl) group ]> PhNO2 [I and R effect of (NO2) group ]

So the answer is option (C).

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