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Question
Which one of the following orders is correct regarding the inductive effect of the substituents?
Options:
A .  −NR2−F
B .  −NR2>−OR>−F
C .  −NR2
D .  −NR2>−OR
Answer: Option C
:
C
Relative inductive effects have been experimentally measured with reference to hydrogen, in decreasing order of -I effect or increasing order of +I effect, as follows:
–NH3+> –NO2> –SO2R > –CN > –SO3H > –CHO > –CO > –COOH > –COCl> –CONH2>
–F > –Cl > –Br > –I > –OR > -OH > –NH2> –C6H5> –CH=CH2> –H
From this, you can get the required answer.

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