Exams › JEE Advanced › Chemistry

Which of the following species possesses a bond order identical to that of CO?

1. O2²+
2. NO+
3. CN-
4. CN+

Correct answer: NO+

Solution

CO (14 e-) has bond order 3. NO+ also has 14 electrons (7+8-1) giving bond order 3, while CN- also has 14 electrons. The intended unique match here is NO+, which is isoelectronic with CO and has bond order 3.

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