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Grade 12th pass10 grade science

Which one of the following orders is correct for the bond dissociation enthalpy of halogen molecules? A) I2>Br2>Cl2>F2 B) Cl2>Br2>F2>I2 C) Br2>I2>F2>Cl2 D) F2>Cl2>Br2>I2

Profile image of Harshit Singh
4 Years agoGrade 12th pass
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1 Answer

Profile image of Jayesh Vashishtha
4 Years ago
Dear student,
 
With an increase in size, the bond dissociation enthalpy decreases. Fluorine has exceptionally low bond dissociation enthalpy because of the high electronegativity but higher than iodine.
 

 
So the  increasing order of bond dissociation enthalpies is Cl2​>Br2​>F2​>I2​ 
 
So the correct answer is 0.
 
regards,
team Askiitians

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