The molecular mass of Br₂ and ICl is approximately the same but the boiling point of ICl is about 40° higher than that of Br₂ because

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I–Cl bond is stronger than Br-Br bond

ICl is polar while Br₂ is non polar

IE of Br > IE of I

ICl is bigger than Br₂

answer is C.

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Detailed Solution

Compounds with high polarity usually have high boiling point than compounds with low polarity because the intermolecular forces are stronger in compounds with low polarity because the intermolecular forces are stronger in compounds with a high polarity.

Here, ICl is polar and Br₂ is non-polar.

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