Solutions (Class 12 NCERT) — 30 Question Quiz

Revision: concentration terms, Raoult’s/Henry’s laws, colligative properties, van't Hoff factor & practical concepts.

1. A homogeneous mixture of two or more non-reacting substances is called a:

2. The major component of a solution is called the:

3. Molality (m) is defined as:

4. Which concentration term is temperature independent?

5. Mole fraction (ฯ‡) of components in a solution sums to:

6. Henry’s law relates the partial pressure of a gas above solution to:

7. Increasing pressure on a gas-liquid system (at constant T) generally:

8. Raoult’s law for a volatile component A is:

9. Relative lowering of vapor pressure (ฮ”P/P°) equals:

10. An ideal solution has which mixing enthalpy (ฮ”Hmix)?

11. Colligative properties depend on:

12. Elevation of boiling point ฮ”Tb is proportional to:

13. Osmotic pressure (ฯ€) is given by van’t Hoff equation as:

14. Which colligative property is preferred to determine molar mass of polymers?

15. A solution isotonic with blood (approx) is:

16. Reverse osmosis (RO) is primarily used for:

17. Abnormal molar masses in colligative measurements are often due to:

18. The van’t Hoff factor (i) for a non-electrolyte is:

19. For NaCl (ideal dissociation) expected i value is:

20. If ฯ‡solvent = 0.8, then ฯ‡solute equals:

21. Azeotropes are mixtures that:

22. Positive deviation from Raoult’s law occurs when:

23. A mixture showing negative deviation typically forms which azeotrope?

24. Which property is often used graphically to find boiling point elevation?

25. Osmosis occurs through a:

26. If a solute associates (dimerizes) in solution, the van’t Hoff factor i will be:

27. For K₂SO₄ ideal dissociation gives i =:

28. Which effect does adding a non-volatile solute have on solvent vapor pressure?

29. Which solvent property determines Kb and Kf values?

30. Why does CaCl₂ lower freezing point more effectively than NaCl on equal molal basis?