a) Cl>Br>I

B)I>Br>Cl

c)I>Cl>Br
d)Br>I>Cl

Dear Sumukh

The oxidizing power of halogens decreases as the group is descended from Fluorine to Iodine. This is because a strong oxidizing agent attracts electrons strongly to itself and Fluorine is most able to do this because few electrons shielding the nucleus

Hence the order is F₂ > Cl₂ > Br₂ > I₂

hence option (a)

All the best.                                                           

AKASH GOYAL

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