NEET 2017 Chemistry question

Which one of the following pairs of species have the same bond order?

Answer: (3)

Solution

Use molecular orbital theory. Bond orders: (10 valence electrons) = 3; CO (10 valence electrons) = 3; (11) = 2.5; (12) = 2; (10) = 3; (10) = 3;

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Question ID VK-092093