JEE CHEMISTRY UNIT 05
QUIZ NO 1
TOTAL QUESTIONS = 20
1. Which of the following is the unit of molality?;mol/L;mol/kg;mol/m^3;mol/mol;B
A.
B.
C.
D.
2. The van't Hoff factor for KCl in aqueous solution is approximately
A. 4
B. 3
C. 2
D. 1
3. The solubility of a gas in a liquid is governed by
A. Raoult's law
B. Henry's law
C. Boyle's law
D. Charles's law
4. The addition of a non-volatile solute to a solvent results in
A. Decrease in vapor pressure
B. Fluctuation in vapor pressure
C. Increase in vapor pressure
D. No change in vapor pressure
5. The molality of a solution is defined as
A. Moles of solute per liter of solution
B. Moles of solute per kg of solvent
C. Moles of solute per gram of solvent
D. Moles of solute per mole of solvent
6. Which of the following properties is not a colligative property?
A. Osmotic pressure
B. Surface tension
C. Freezing point depression
D. Boiling point elevation
7. Which of the following solutions has the highest boiling point?
A. 0.1 M Urea
B. 0.1 M BaCl2
C. 0.1 M Glucose
D. 0.1 M NaCl
8. If two solutions have the same osmotic pressure, they are
A. Isotonic
B. Hypotonic
C. Saturated
D. Hypertonic
9. An azeotropic mixture exhibits
A. Negative deviation from Raoult's law
B. Variable boiling point
C. Constant boiling point
D. Positive deviation from Raoult's law
10. The depression in freezing point of a solution is due to
A. Decrease in solubility of solute
B. Increase in vapor pressure of the solute
C. Decrease in vapor pressure of the solvent
D. Increase in boiling point of the solvent
11. The van’t Hoff factor for a solution of MgCl2 is
A. 3
B. 2
C. 4
D. 1
12. The vapor pressure of a solution decreases because
A. The solution is dilute
B. The solute is non-volatile
C. The solvent evaporates faster
D. The solute particles occupy surface area
13. The freezing point depression constant (Kf) depends on
A. Temperature
B. Nature of the solvent
C. Nature of the solute
D. Concentration of solute
14. The freezing point of a 0.1 M urea solution is approximately
A. -0.372°C
B. -0.186°C
C. 0°C
D. -1.86°C
15. Henry's law constant (KH) is inversely proportional to
A. Mole fraction of gas
B. Pressure of gas
C. Solubility of gas
D. Temperature
16. Raoult's law is applicable to
A. Non-volatile solutes only
B. Electrolyte solutions only
C. Volatile solutes only
D. Both volatile and non-volatile solutes
17. Colligative properties depend on
A. The chemical structure of the solute
B. The molecular size of the solute
C. The nature of the solute
D. The number of solute particles
18. The colligative property depends on
A. Nature of solvent
B. Nature of solute particles
C. Molecular weight of solute
D. Number of solute particles
19. Henry's law constant for a gas increases with
A. Increase in solubility
B. Increase in temperature
C. Decrease in temperature
D. Decrease in solubility
20. What happens to the freezing point of water when a solute is added?
A. Increases
B. Decreases
C. Remains the same
D. First increases then decreases
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