Example 1 · difficulty 1/5
CH≡CCH₂CH₃ is named:
- A. but-1-yne
- B. but-2-yne
- C. but-1-ene
- D. 2-methylpropyne
2021 source guide · Chemistry
NEET 2021 Chemistry Hydrocarbons Questions
Use this page to connect the official 2021 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
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 2/5
Which pair represents chain isomerism?
- A. ethene and ethyne
- B. n-Butane and 2-methylpropane
- C. ethane and ethene
- D. cis-but-2-ene and trans-but-2-ene
Example 3 · difficulty 2/5
Which pair represents position isomerism?
- A. butane and 2-methylpropane
- B. ethene and cyclohexane
- C. but-1-ene and but-2-ene
- D. cis-but-2-ene and trans-but-2-ene
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 2021 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 2021 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.