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
Connect the official 2018 paper with current Chemistry practice without labelling original previews as PYQs.
250 original questions · explicit provenance labels
ChemistryPlate 61
NeetVellum atlas · fig. chemistry
61
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.