Which of the following bonds is the strongest ?

Question

Which of the following bonds is the strongest ? (A) F -F (B) Cl-Cl (C) I-I (D) Br-Br

Tardigrade Admin · Accepted Answer

B.E. of Cl-Cl bond is more than F-F bond. The unexpected less B.E. of F-F bond is due to repulsions between the lone pairs of electrons on two F atoms.

Q. Which of the following bonds is the strongest ?

F -F

Cl-Cl

I-I

Br-Br

B.E. of Cl-Cl bond is more than F-F bond. The unexpected less B.E. of F-F bond is due to repulsions between the lone pairs of electrons on two F atoms.