Which of the following is the correct order of reactivity of dihydrogen with halides?

I_{2} > B r_{2} > C l_{2} > F_{2}

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C l_{2} > F_{2} > B r_{2} > I_{2}

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F_{2} > C l_{2} > B r_{2} > I_{2}

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I_{2} > F_{2} > B r_{2} > C l_{2}

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Solution

The correct option is C $F_{2} > C l_{2} > B r_{2} > I_{2}$
Down the group as the size of the halides increases, the reactivity of dihydrogen decreases.
The correct order of reactivity is :
$F_{2} > C l_{2} > B r_{2} > I_{2}$

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