Separate graphs are drawn for two diatomic molecules, M₂ and X₂
CHEMISTRY · Single correct · CBSE · Chemistry · Chemical Bonding and Molecular Structure · Chemical Bonding and Molecular Structure
Problem
Separate graphs are drawn for two diatomic molecules, M₂ and X₂.
Graph 1 (M₂): energy axis is marked every 100 kJ·mol⁻¹; the curve reaches a minimum six tick marks below zero at an internuclear distance of 90 pm.
Graph 2 (X₂): energy axis is marked every 50 kJ·mol⁻¹; the curve reaches a minimum six tick marks below zero at an internuclear distance of 120 pm.
Which statement best compares the bond energy and bond length of the two molecules?
(a) X₂ has a greater bond energy and a shorter bond length than M₂.
(b) M₂ has a greater bond energy but a longer bond length than X₂.
(c) M₂ has a greater bond energy and a shorter bond length than X₂.
(d) X₂ has a greater bond energy but a longer bond length than M₂.