Consider the following groups ▬NO2, ▬CN, ▬COOH, ▬CH3, ▬C2H5, ▬COOR, ▬OAr . How many of them show -I effect?

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▬NO2 and ▬CN only

▬NO2, ▬COOH and ▬COOR only

▬COOR and ▬O ▬Ar only

All except ▬CH3 and ▬C2H5

answer is D.

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Detailed Solution

▬CH3 and ▬C2H5 are considered electron donating groups.

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