Which of the following is correct with respect to -I effect of the substituents? (R = alkyl)

NEET 2018 Chemistry question

Which of the following is correct with respect to effect of the substituents? ( = alkyl)

(1)
(2)
(3)Correct
(4)

Answer: (3)

Solution

The effect (electron withdrawal through sigma bonds) increases with the electronegativity of the atom attached to the carbon chain: N O F. Hence the strength is (option 3). Options (1) and

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Question ID VK-092259