Question

The correct order of following compounds for increasing reactivity towards electrophilic substitution is:

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A

IV< II < I < III

B

III < II < I < IV

C

I < IV < III < II

D

II < III < I < IV

Hard

Solution

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Correct option is A)

Here and are activating groups, that are promoting electrophilic substitution reactions.  is a deactivating group, which has the opposite effect. Hence, the order of increasing reactivity towards electrophilic substitution reaction is:

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