wiz-icon
MyQuestionIcon
MyQuestionIcon
18
You visited us 18 times! Enjoying our articles? Unlock Full Access!
Question

The correct oredr of bond dissociation enthalpy of halogens is :


<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> JEE MAINS 2021

Open in App
Solution

Bond energy is inversely dependent on bond length. The order of bond length is I2>Br2>Cl2>F2..

Hence, the order of bond energy should be I2<Br2<Cl2<F2.. But, bond dissociation enthalpy of F2 is less than Cl2 because of small size of F2 and large inter-electronic repulsions.
Thus, order of bond energy is Cl2>F2 and Br2<Cl2.
So, option (d) is correct.
Compound Enthalpy of dissociation
(in kJ/mol)
F-F 158.8
Cl-Cl 242.6
Br-Br 192.8
I-I 151.1

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Reaction Intermediate - Free Radical
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon