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When N₂ and O₂ each lose one electron to form N₂⁺ and O₂⁺, respectively, which statement is incorrect?

1. In N₂⁺, the N–N bond becomes weaker
2. In O₂⁺, the O–O bond order increases
3. In O₂⁺, its paramagnetic character decreases
4. N₂⁺ turns diamagnetic

Correct answer: N₂⁺ turns diamagnetic

Solution

N₂⁺ is diamagnetic because it has all of its electrons paired, resulting in no net magnetic moment. This occurs after the removal of an electron from the bonding molecular orbital, which does not affect the pairing of the remaining electrons.

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