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Which one of the following pairs of species have the same bond order?
- CN− and NO+
- CN− and CN+
- O2− and CN−
- NO+ and CN+
Correct answer: CN− and NO+
Solution
CN- has 14 electrons (bond order 3) and NO+ also has 14 electrons (bond order 3), so they share the same bond order. CN+ (12 e-) has bond order 2 and O2- has bond order 2.5.
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