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
Current-syllabus practice · Chemistry
NEET Chemistry Solutions Questions
Solutions practice focused on concentration terms, vapour pressure, colligative properties and abnormal molar mass. Every preview below comes from NeetVellum's live original bank—not an unverified PYQ reconstruction.
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
How many Solutions NEET questions are available?
NeetVellum currently publishes 119 original, verified questions across the linked canonical chapter.
How should I revise Solutions for NEET?
Attempt questions before rereading, classify each miss, repair the specific concept, and re-practice after a delay until the error pattern disappears.