Example 1 · difficulty 1/5
A solution is prepared by dissolving 6 g of urea (molar mass 60 g mol⁻¹) in 178.2 g of water. The mole fraction of urea in the solution is:
- A. 0.01
- B. 0.10
- C. 0.99
- D. 0.001
2016 source guide · Chemistry
NEET 2016 Chemistry Solutions Questions
Use this page to connect the official 2016 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
concentration terms, vapour pressure, colligative properties and abnormal molar mass.
Original practice preview
These are current-syllabus NeetVellum questions, shown separately from historical-paper provenance.
Example 2 · difficulty 2/5
At a certain temperature, the Henry's law constant for argon dissolved in water is 40.3 kbar. If argon gas is bubbled over water at a partial pressure of 0.806 bar, the mole fraction of argon dissolved in the water is:
- A. 2 × 10⁻³
- B. 2 × 10⁻⁵
- C. 5 × 10⁻⁵
- D. 4 × 10⁻⁵
Example 3 · difficulty 3/5
Liquids A and B form an ideal solution. At 350 K, the vapour pressures of pure A and pure B are 450 mm Hg and 700 mm Hg respectively. For a solution of A and B whose total vapour pressure is 600 mm Hg, the mole fraction of A in the vapour phase is:
- A. 0.40
- B. 0.70
- C. 0.30
- D. 0.43
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 2016 Chemistry Solutions 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 2016 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.