Example 1 · difficulty 2/5
For which of the following equilibria is the numerical value of Kp equal to that of Kc?
- A. H₂(g) + I₂(g) ⇌ 2HI(g)
- B. N₂(g) + 3H₂(g) ⇌ 2NH₃(g)
- C. PCl₅(g) ⇌ PCl₃(g) + Cl₂(g)
- D. CaCO₃(s) ⇌ CaO(s) + CO₂(g)
2019 source guide · Chemistry
NEET 2019 Chemistry Questions
Use this page to connect the official 2019 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.
Original practice preview
These are current-syllabus NeetVellum questions, shown separately from historical-paper provenance.
Example 2 · difficulty 3/5
A 0.02 M solution of a weak monobasic acid HA has Ka = 2.0 × 10⁻⁶. What is the pH of this solution?
- A. 1.70
- B. 3.70
- C. 4.00
- D. 5.70
Example 3 · difficulty 2/5
In the Haber process, N₂(g) + 3H₂(g) ⇌ 2NH₃(g), ΔH = −92 kJ mol⁻¹. Which of the following changes increases the equilibrium yield of NH₃?
- A. Raising the temperature at constant pressure
- B. Decreasing the total pressure
- C. Continuously liquefying and removing NH₃ as it forms
- D. Adding an inert gas at constant volume
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
Some Basic Concepts of Chemistry →Structure of Atom →Classification of Elements and Periodicity in Properties →Chemical Bonding and Molecular Structure →Thermodynamics →Equilibrium →Redox Reactions →Organic Chemistry: Some Basic Principles and Techniques →Hydrocarbons →Solutions →Electrochemistry →Chemical Kinetics →The d- and f-Block Elements →Coordination Compounds →Haloalkanes and Haloarenes →Alcohols, Phenols and Ethers →Aldehydes, Ketones and Carboxylic Acids →Amines →Biomolecules →
Frequently asked questions
Are these official NEET 2019 Chemistry 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 2019 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.