NCERT · Class 11 · Chemistry · Chemical Bonding and Molecular StructureWhich of the following molecules does NOT obey the octet rule?
Step-by-Step Solution
In $BF_3$, the central boron atom has only 6 valence electrons around it after sharing electrons with three fluorine atoms. Hence, it is an electron-deficient molecule and an exception to the octet rule.
Detailed Options Breakdown
Option : CH₄
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Chemical Bonding and Molecular Structure.
Option 1: H₂O
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Chemical Bonding and Molecular Structure.
Option 2: BF₃ (Correct Answer)
Correct choice. Refer to the step-by-step verified solution guidelines above for details.
Option 3: NH₃
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Chemical Bonding and Molecular Structure.
💡 Study Guide: This question tests core syllabus concepts from Chemical Bonding and Molecular Structure. For formulas, key summaries, and mock exam reference guides, read the full Chemical Bonding and Molecular Structure Revision Notes.