JEE Main 2014 · 6 Apr · Shift 1 · Chemistry Q44

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ChemistrySingle correct+4 / -1Question 44 of 90

Which one of the following properties is not shown by NO ?

It is diamagnetic in gaseous state

It is a neutral oxide

It combines with oxygen to form nitrogen dioxide

It's bond order is 2.5

Answer and worked solution

Official answer: A

NO has 11 valence electrons, one of them unpaired in a π* orbital, so it is paramagnetic. Its bond order is $\frac{8-3}{2}=2.5$ , it is neutral, and it gives $\ce{NO2}$ with $\ce{O2}$ . The property it does not show is diamagnetism.

Topics:Molecular orbital theory Group 15

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JEE Main 2014 · 6 Apr · Shift 1, Chemistry question 44