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JEE · NEET Previous Year Question

$The correct order of bond dissociation enthalpy of halogen is :$

Topic: JEE PYQ

Answer: C. Full step-by-step solution below.

A $F_{2} > C l_{2} > B r_{2} > I_{2}$
B $C l_{2} > F_{2} > B r_{2} > I_{2}$
C $C l_{2} > B r_{2} > F_{2} > I_{2}$
D $I_{2} > B r_{2} > C l_{2} > F_{2}$

Correct answer: C

Solution

(c) Fact based has involves repulsion of non-bonding electrons \& more over its size is small &hence due to high repulsion its bond dissociation energy in very low.

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