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JEE Main Chemistry question

ChemistryChemical Bonding and Molecular StructureJEE Main

Peroxide ion: (i) has five completely filled antibonding molecular orbitals (ii) is diamagnetic (iii) has bond order one (iv) is isoelectronic with neon. Which one of these is correct? **[K CET 2010]**

Answer: (A)

Solution

has three completely filled antibonding MOs (, , ), not five, so (i) is false. All 14 electrons are paired, so it is

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Question ID VK-156158