Arrange the following bonds according to their average bond energies in descending order : C-Cl,\; C-Br,\; C-F,\; C-I
Option: 1 C-F> C-Cl> C-Br> C-I

Option: 2 C-Br> C-I> C-Cl> C-F

Option: 3 C-I> C-Br> C-Cl> C-F

Option: 4 C-Cl> C-Br> C-I> C-F
 

Answers (1)

The values of bond energies are given below:

C-F\; \; \; \;\; -\; \; \; \; 485kJ/mol       

C-Cl\; \; \; \;\; -\; \; \; \; 328kJ/mol     

C-Br\; \; \; \;\; -\; \; \; \; 276kJ/mol   

C-I\; \; \; \;\; -\; \; \; \; 240kJ/mol     

Thus, the correct order of bond energies is:

C-F> C-Cl> C-Br> C-I

Therefore, Option(1) is correct.

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