JEE Main Chemistry question

Molecular size of ICl and is nearly the same, but the boiling point of ICl is about 40°C higher than . This might be due to

(A)The I–Cl bond is stronger than the Br–Br bond
(B)Ionisation energy of I is less than ionisation energy of Br
(C)ICl is polar whereas is non-polarCorrect
(D)The size of I is greater than the size of Br

Answer: (C)

Solution

ICl is a heteronuclear molecule with a permanent dipole moment (polar), so in addition to the usual van der Waals forces, its molecules also experience dipole-dipole attractions. , being a homonuclear molecule, is non-polar and relies only on weaker van der

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Question ID VK-133391