Example 1 · difficulty 2/5
Which molecule is an electron-deficient exception to the octet rule in its usual Lewis structure?
- A. CH₄
- B. NH₃
- C. BF₃
- D. H₂O
2018 source guide · Chemistry
NEET 2018 Chemistry Chemical Bonding Questions
Use this page to connect the official 2018 paper with current Chemistry practice. NeetVellum does not claim a chapter appeared in that paper until the official question and final key have been mapped.
What to master
Lewis structures, VSEPR, hybridisation, molecular orbitals and intermolecular forces.
Original practice preview
These are current-syllabus NeetVellum questions, shown separately from historical-paper provenance.
Example 2 · difficulty 2/5
Which species cannot give every atom an octet because it contains an odd total number of valence electrons?
- A. CO₂
- B. N₂
- C. CH₄
- D. NO
Example 3 · difficulty 2/5
Which molecule illustrates expansion of the octet of its central atom?
- A. PCl₅
- B. BCl₃
- C. BeCl₂
- D. NO
The evidence-first practice loop
- 1. Verify provenanceOfficial paper and final key before accepting a PYQ label.
- 2. Attempt closed-bookExpose the concept or execution gap before rereading.
- 3. Repair and returnClassify the miss and re-practice after a delay.
Canonical chapter practice
Frequently asked questions
Are these official NEET 2018 Chemistry Chemical Bonding PYQs?
No. The previews are original NeetVellum practice questions. A historical item receives a PYQ label only after its official paper and authoritative final answer key are attached. Use the official archive for the source paper.
How should I use the NEET 2018 paper?
Solve the official paper under its original timing, verify against the final key, classify every miss, and then use the linked current-syllabus practice bank to repair the exposed concept.