Which of the following has the highest melting point?

F_{2}

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C l_{2}

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B r_{2}

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I_{2}

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Solution

The correct option is D $I_{2}$
Moving down the group boiling point as well as melting point generally increases.

Molecule Boiling Point (in K) Melting Point (in K)

$F_{2}$ 84.9 54.4

$C l_{2}$ 239.9 172

$B r_{2}$ 332.5 265.8

$I_{2}$ 458.2 386.6

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