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Question

Let the bond order of O22 be X and that of CO be Y. Then the value of XY is _____?


A

2

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B

6

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C

3

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D

4

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Solution

The correct option is C

3


In this question, we have to check the bond order of each molecule.

To get the Bond order, we have to know the number of bonding electrons and number of anti-bonding electrons

To get number of bonding electrons and number of anti-bonding electrons. Let's draw MO energy level diagrams of the following species.

Now,

Bond Order =12[Number of Bonding electrons - Number of Anti Bonding electrons ]

O22 BO = 12×[108] = 1 = (X)

CO BO = 12×[104] = 3 = (Y)

Therefore

X × Y = 1× 3 = 3


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