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

All except ▬CH 3 and ▬C 2 H 5

▬NO 2 , ▬COOH and ▬COOR only

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

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All except ▬CH₃ and ▬C₂H₅

▬NO₂, ▬COOH and ▬COOR only

▬COOR and ▬O ▬Ar only

▬NO₂ and ▬CN only

answer is D.

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▬CH₃ and ▬C₂H₅ are considered electron donating groups.

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