The decreasing order of -I effect of the following is :
I.R4N⊕
II.NO2
III.CN
IV.SO3H
V.COOH
A
I > II > III > IV > V
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B
II > I > III > IV > V
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C
I > II > III > V > IV
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D
II > I > V > IV > III
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Solution
The correct option is A I > II > III > IV > V The decreasing order of -I effect is I.R4N⊕>II.NO2>III.CN>IV.SO3H>V.COOH As the magnitude of the positive charge on an atom decreases, the -I effect decreases.