Home Chemistry S and P - Block Elements (S - Block Elements Not In Syllabus ) Halogens and their Compounds Which of the following possess the highest b…
Chemistry S and P - Block Elements (S - Block Elements Not In Syllabus ) Halogens and their Compounds Single Correct MCQ
Published on: August 13, 2026

Which of the following possess the highest bond energy ?

A
F2
B
Cl2
C
Br2
D
I2

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Text Solution

Verified by Experts
The correct answer is:
B

The X-X bond disassociation enthalpies from chlorine onwards show the expected trend : Cl – Cl > Br – Br > F – F > I – I. The reason for the smaller enthalpy of dissociation of F2 is the relatively larger electrons-electrons repulsion among the lone pairs in F2 molecule where they are much closer to each other than in case of Cl2.

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