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In which of the following processes, the bond order increases and paramagnetic character changes to diamagnetic one ? (1) O2 → O2+ (2) O2 → O2− (3) NO → NO+ (4) N2 → N2+
- (1) O2 → O2+
- (2) O2 → O2−
- (3) NO → NO+
- (4) N2 → N2+
Correct answer: (3) NO → NO+
Solution
The process NO → NO+ results in the removal of an electron from a bonding orbital, which increases the bond order and eliminates the unpaired electron, thus changing the molecule from paramagnetic to diamagnetic.
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