Example 1 · difficulty 2/5
What is the principal organic product when D-glucose is oxidised with bromine water?
- A. Saccharic acid
- B. D-Fructose
- C. Sorbitol
- D. Gluconic acid
2021 source guide · Chemistry
NEET 2021 Chemistry Biomolecules 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
carbohydrates, proteins, enzymes, vitamins and nucleic acids.
Original practice preview
These are current-syllabus NeetVellum questions, shown separately from historical-paper provenance.
Example 2 · difficulty 2/5
Strong oxidation of glucose with nitric acid converts both its terminal aldehyde and primary alcohol groups into carboxyl groups. Which product results?
- A. Saccharic acid
- B. Gluconic acid
- C. Sorbitol
- D. Fructose
Example 3 · difficulty 2/5
In the name D-(+)-glucose, what does the prefix D specify?
- A. The solution has a positive optical rotation
- B. The hydroxyl group on C5 lies on the right in its Fischer projection, corresponding to D-glyceraldehyde
- C. The carbonyl carbon is C1
- D. The molecule contains six carbon atoms
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 Biomolecules 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.