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How many types of exceptions to the octet rule are described?
AThree
BNine
CSeven
DTwelve
Answer & Solution
Correct answer: A. Three
1. The octet rule does not hold universally.
2. Its failures fall into a small number of groups.
3. There are three types of exceptions to the octet rule.
4. So the answer is three.
_Source: NCERT Class XI Chemistry Part I, Unit 4 'Chemical Bonding and Molecular Structure'_
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