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Per NCERT §4.1.5, which of the following is an example of an INCOMPLETE octet of the central atom?
ANH₄⁺
BBCl₃ — boron has only 6 valence electrons around it
CH₂O
DCCl₄
Answer & Solution
Correct answer: B. BCl₃ — boron has only 6 valence electrons around it
Per NCERT §4.1.5, BCl₃ + BeH₂ + LiCl have central atoms with <8 e⁻ (incomplete octet). AlCl₃, BF₃ similar.
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