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Question

Which of the following molecules does not obey octet rule?

A
CO2
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B
BCl3
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C
PCl5
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D
(b) and (c) both
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Solution

The correct option is D (b) and (c) both
In BCl3 and PCl5, B and P contain 6 and 10 electrons respectively in their valence shell. Therefore, they violate the octet rule.
Hence, the correct answer is option (d).

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