#### Answer

The correct answer is $(d)$ $(NO_2)$

#### Work Step by Step

In $NO_2$, the N has 5 valence electrons and O has 6 valence electrons. The sum of valence electrons is an odd number. So, it is expected to be a free radical.

Published by
Pearson

ISBN 10:
0134112830

ISBN 13:
978-0-13411-283-1

The correct answer is $(d)$ $(NO_2)$

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