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JEE Main 2013 Chemistry question

ChemistryChemical Bonding and Molecular StructureJEE Main 2013

Bond order normally gives idea of stability of a molecular species. All the molecules viz. , and have the same bond order yet they are not equally stable. Their stability order is :

Answer: (4)

Solution

All three have bond order 1. The usual textbook argument: is most stable (smallest atoms, strongest overlap); has no electrons in antibonding orbitals beyond the core, while

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Question ID VK-104019