Example 1 · difficulty 1/5
What is the conjugate base of H₂CO₃?
- A. H₂CO₃⁺
- B. H₃O⁺
- C. OH⁻
- D. HCO₃⁻
2021 source guide · Chemistry
NEET 2021 Chemistry Equilibrium Questions
Connect the official 2021 paper with current Chemistry practice without labelling original previews as PYQs.
250 original questions · explicit provenance labels
ChemistryPlate 11
NeetVellum atlas · fig. chemistry
11
What to master
chemical equilibrium, acids, bases, buffers, solubility and ionic equilibria.
Original practice preview
These are current-syllabus NeetVellum questions, shown separately from historical-paper provenance.
Example 2 · difficulty 2/5
How is BF₃ classified in Lewis acid–base theory?
- A. Lewis acid
- B. Lewis base
- C. Brønsted acid only
- D. Neither acid nor base
Example 3 · difficulty 2/5
Assuming complete dissociation, what is the pH of 0.01 M HCl at 25 °C?
- A. 12.00
- B. 2.00
- C. 3.00
- D. 1.00
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 Equilibrium 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.