Which of the following molecules violates the octet rule?

C O_{2}

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N_{2}

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O_{2}

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B C l_{3}

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Solution

The correct option is D $B C l_{3}$
In $B C l_{3}$ , boron has only 6 electrons in it's valence shell (3 from boron and 3 from chlorine atoms) and, one vacant p-orbital. $B C l_{3}$ does not obey octet rule.

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