Example 1 · difficulty 4/5
According to Hückel's rule, which of the following species is aromatic?
- A. Cycloheptatrienyl (tropylium) cation
- B. Cyclopentadienyl cation
- C. Cyclooctatetraene
- D. Cyclobutadiene
2018 source guide · Chemistry
NEET 2018 Chemistry Hydrocarbons Questions
Connect the official 2018 paper with current Chemistry practice without labelling original previews as PYQs.
200 original questions · explicit provenance labels
ChemistryPlate 71
NeetVellum atlas · fig. chemistry
71
What to master
structure, preparation and reaction patterns of aliphatic and aromatic hydrocarbons.
Original practice preview
These are current-syllabus NeetVellum questions, shown separately from historical-paper provenance.
Example 2 · difficulty 4/5
But-2-yne on partial hydrogenation with H₂ over Lindlar catalyst gives:
- A. Butane
- B. But-1-ene
- C. trans-But-2-ene
- D. cis-But-2-ene
Example 3 · difficulty 1/5
Hydrocarbons are compounds containing only:
- A. carbon and hydrogen
- B. carbon and oxygen
- C. hydrogen and oxygen
- D. carbon, hydrogen and nitrogen
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 Hydrocarbons 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.