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Question

What are the exceptions of the octet rule?

A
The incomplete octet of central atom
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B
An odd number of electrons on central atom
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C
Expanded octet of the central atom
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D
All of these
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Solution

The correct option is D All of these
According to octet rule, the central atom must have 8 electrons but in some compounds the number of electrons is more than 8, or less than 8 or an odd number of electrons is left on the central atom e.g., PF5,BCl3,NO.
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