Question

The intermolecular potential energy for the molecules A, B, C and D given below suggests that : 

(1) D is more electronegative than other atoms

(2) A-D has the shortest bond length 

(3) A-B has the stiffest bone 

(4) A–A has the largest bond enthalpy

Comments

* bond in option 3 not bone

Answer 1

(3) A-B has the stiffest bone 

From the given graph, potential energy of A-B molecule is minimum. 

Thus A-B bond is most stable and have strongest bond amongst these. 

B → Most electronegative 

D → Least electronegative 

A-B → Shortest bond length 

A-B → Largest bond enthalpy 

Therefore correct option is (3).