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
Connect the official 2021 paper with current Chemistry practice without labelling original previews as PYQs.
150 original questions · explicit provenance labels
ChemistryPlate 50
NeetVellum atlas · fig. chemistry
50
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.