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The correct order of bond dissociation enthalpy of halogens is

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The correct order of bond dissociation enthalpy of halogens is :

(1) Cl2 > F2 > Br2 > I2

(2) I2 > Br2 > Cl2 > F2

(3) Cl2 > Br2 > F2 > I2

(4) F2 > Cl2 > Br2 > I2

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1 Answer

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(3) Cl2 > Br2 > F2 > I2

Correct order of bond dissociation enthalpy of halogens is Cl2 > Br2 > F2 > I2. Due to inter electronic repulsions F–F bond becomes weak and easily broken.

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