Octet rule is not valid for the which of the following molecule?

{C O}_{2}

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N O

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O_{2}

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P {C l}_{3}

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Solution

The correct option is B $N O$
Answer $B$
Nitric acid has the formula NO. The total number of valence electrons from all atoms $5 + 6 = 11$
Hence, no matter how electrons are shared between the $N$ and $O$ atoms, there is no way for nitrogen to have an octet. It will have seven electrons assuming that the oxygen atom does satisfy the octet.
Hence octet rul is not valid for $N O .$

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