NEET2016Chemistry-Chemical Bonding
NEET 2016 Chemistry Bond Enthalpy MCQ Question
Type: MCQ-conceptual-Medium-Class 11
Which one of the following orders is CORRECT for the bond dissociation enthalpy of halogen molecules?
A
Br₂ > I₂ > F₂ > Cl₂
B
F₂ > Cl₂ > Br₂ > I₂
C
I₂ > Br₂ > Cl₂ > F₂
D
Cl₂ > Br₂ > F₂ > I₂
Correct Answer
Option D
Detailed Explanation
The bond dissociation enthalpy generally decreases down the group in halogens. However, F₂ has a lower bond enthalpy than Cl₂ due to repulsion between lone pairs of electrons.
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