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
Connect the official 2021 paper with current Chemistry practice without labelling original previews as PYQs.
200 original questions · explicit provenance labels
ChemistryPlate 77
NeetVellum atlas · fig. chemistry
77
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.