Start learning →

Which of the following compounds is an example of *incomplete* octet of the central atom?

ASF₆
BBF₃
CNH₃
DPCl₅
Answer & Solution
Correct answer: B. BF₃
**BF₃** — boron has only 6 electrons around it (3 B–F bonds), an incomplete octet. PCl₅ and SF₆ show *expanded* octets; NH₃ obeys the octet.
Practise this question with Quill — NEET UG →

Keep practising Unit 2A: Chemical Bonding, Lewis Diagrams & Molecular Geometry

Browse all Unit 2A: Chemical Bonding, Lewis Diagrams & Molecular Geometry questions for NEET UG, or explore more Chemistry topics.

Start a Unit 2A: Chemical Bonding, Lewis Diagrams & Molecular Geometry lesson →
Related questions
The shape of $AsF_5$ according to VSEPR theory: ![](https://qallery.app/diagrams/v2_46c8bStability of the species $Li_2$, $Li_2^-$ and $Li_2^+$ increases in the order of:The order of increasing polarity in HCl, $\mathrm{CO}_{2}$ , $\mathrm{H}_{2}\mathrm{O}$ Isoelectronic species N₂, CO and NO⁺ all have a bond order of:Which of the following is an example of *intramolecular* hydrogen bonding?A hydrogen bond is formed when an H atom is covalently bonded to:The bond order in N₂, O₂ and O₂²⁻ (peroxide) are respectively:The paramagnetism of O₂ is explained by MO theory because the molecule has: