Bond enthalpy of AB bond is highest so A−B bond is more strong and B is highest electronegative atom. Order of bond length ⇒A−A<A−B<A−C<A−D
JEE Main 2020 — Chemistry Inorganic Chemistry
The intermolecular potential energy for the moleculesA ,B , C and D given below suggests that:

Held on 4 Sept 2020 · Verified 6 Jul 2026.
A−D has the shortest bond length
A−A has the largest bond enthalpy
D is more electronegative than other atoms.
A−B has the stiffest bond.
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