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Consider the following species: CN+, CN−, NO and CN. Which one of these will have the highest bond order?

1. CN+
2. CN−
3. NO
4. CN

Correct answer: CN−

Solution

Bond order is calculated as (number of bonding electrons - number of antibonding electrons)/2. CN− has the highest bond order of 3, as it has the maximum number of bonding electrons among the given species.

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