Choose the the correct order of $- I$ effect shown by the following groups.

F > C l > B r > I

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I > C l > B r > F

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F < C l < B r < I

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F > C l > I > B r

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Solution

The correct option is A $F > C l > B r > I$
More the electronegative atom, more it will have tendency to withdraw electron of sigma bond towards itself.
hence correct order of electron withdrawing group is $F > C l > B r > I$

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Choose the the correct order of −I effect shown by the following groups.

The correct option is A F>Cl>Br>IMore the electronegative atom, more it will have tendency to withdraw electron of sigma bond towards itself. hence correct order of electron withdrawing group is F>Cl>Br>I

Choose the the correct order of $- I$ effect shown by the following groups.

The correct option is A $F > C l > B r > I$
More the electronegative atom, more it will have tendency to withdraw electron of sigma bond towards itself.
hence correct order of electron withdrawing group is $F > C l > B r > I$