Which one of the following does not follow octet rule?
A
PF3
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B
BF3
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C
CO2
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D
CCl4
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Solution
The correct option is CBF3 BF3 does not follow octet rule because central boron atom is surrounded by 6 electrons. 3 electrons are of B atom and remaining 3 electrons are of 3 F atoms. To satisfy octet rule, 8 electrons are required. Boron lacks an electron pair. Hence, it also acts as Lewis acid