1. What is a solution?
A) A mixture of two or more solids only
B) A homogeneous mixture of solute and solvent
C) A heterogeneous mixture of solute and solvent
D) A pure substance
Answer: B) A homogeneous mixture of solute and solvent
2. In a solution, the substance present in the greater amount is called:
A) Solute
B) Solvent
C) Saturant
D) Precipitate
Answer: B) Solvent
3. Which of the following increases solubility of a solid in water?
A) Decreasing temperature
B) Increasing temperature
C) Decreasing pressure
D) None of these
Answer: B) Increasing temperature
4. What type of solution is formed when no more solute can dissolve in a solvent at a given temperature?
A) Unsaturated
B) Saturated
C) Supersaturated
D) Dilute
Answer: B) Saturated
5. A solution containing more solute than it can normally hold at a certain temperature is:
A) Unsaturated solution
B) Saturated solution
C) Supersaturated solution
D) Dilute solution
Answer: C) Supersaturated solution
6. What is the solubility of a gas in a liquid affected by?
A) Pressure
B) Temperature
C) Nature of gas and liquid
D) All of the above
Answer: D) All of the above
7. Henry’s Law is related to:
A) Solubility of solids in liquids
B) Solubility of gases in liquids
C) Crystallization of solids
D) Evaporation
Answer: B) Solubility of gases in liquids
8. Which of the following factors does NOT affect solubility of solids in liquids?
A) Pressure
B) Temperature
C) Nature of solute
D) Nature of solvent
Answer: A) Pressure
9. When a solute dissolves in a solvent, the process is usually:
A) Endothermic
B) Exothermic
C) Both
D) None
Answer: C) Both (depends on solute and solvent)
10. In which type of solution is the solute completely ionized in water?
A) Saturated solution
B) Electrolyte solution
C) Nonelectrolyte solution
D) Supersaturated solution
Answer: B) Electrolyte solution
11. Which is an example of a nonelectrolyte solution?
A) NaCl in water
B) HCl in water
C) Sugar in water
D) KOH in water
Answer: C) Sugar in water
12. Molarity of a solution is defined as:
A) Mass of solute / volume of solution in liters
B) Number of moles of solute / volume of solution in liters
C) Number of moles of solvent / volume of solution
D) Mass percent of solute
Answer: B) Number of moles of solute / volume of solution in liters
13. Molality of a solution is:
A) Moles of solute / liters of solution
B) Moles of solute / kilograms of solvent
C) Mass percent of solute
D) Moles of solvent / liters of solution
Answer: B) Moles of solute / kilograms of solvent
14. Which solution has higher vapor pressure?
A) Concentrated solution
B) Dilute solution
C) Saturated solution
D) Supersaturated solution
Answer: B) Dilute solution
15. Raoult’s law is applicable to:
A) Strong electrolytes
B) Non-volatile solutes in a volatile solvent
C) Ideal solutions
D) Supersaturated solutions
Answer: C) Ideal solutions
16. Which term describes the maximum amount of solute that can dissolve in a solvent at a specific temperature?
A) Solubility
B) Concentration
C) Molality
D) Molarity
Answer: A) Solubility
17. Which of the following increases the solubility of gases in liquids?
A) Increasing temperature
B) Decreasing temperature
C) Decreasing pressure
D) Stirring
Answer: B) Decreasing temperature
18. A solution with low solute concentration compared to the maximum possible is called:
A) Saturated solution
B) Unsaturated solution
C) Supersaturated solution
D) Concentrated solution
Answer: B) Unsaturated solution
19. The process of dissolving a solute in a solvent is called:
A) Dissociation
B) Diffusion
C) Solvation
D) Precipitation
Answer: C) Solvation
20. Which of the following liquids is miscible with water?
A) Benzene
B) Ethanol
C) Hexane
D) Oil
Answer: B) Ethanol
21. Which of the following is an example of a colligative property?
A) Boiling point elevation
B) Density
C) Color
D) Refractive index
Answer: A) Boiling point elevation
22. Freezing point depression occurs when:
A) Solute is added to a solvent
B) Solvent evaporates
C) Temperature rises
D) Gas is dissolved
Answer: A) Solute is added to a solvent
23. Osmotic pressure depends on:
A) Type of solute only
B) Number of solute particles
C) Volume of solvent only
D) Temperature only
Answer: B) Number of solute particles
24. Which of the following is a saturated solution?
A) 10 g of NaCl dissolved in 100 g water at 25°C when max is 36 g
B) 50 g of NaCl dissolved in 100 g water at 25°C when max is 36 g
C) 20 g of NaCl dissolved in 100 g water at 25°C when max is 36 g
D) 30 g of NaCl dissolved in 100 g water at 25°C when max is 36 g
Answer: D) 30 g of NaCl dissolved in 100 g water at 25°C when max is 36 g
25. Supersaturated solutions are:
A) Stable and common
B) Metastable and can crystallize on seeding
C) Always dilute
D) Saturated at low temperature only
Answer: B) Metastable and can crystallize on seeding
26. Solubility of most solid solutes in water:
A) Decreases with temperature
B) Increases with temperature
C) Remains constant
D) Depends on pressure
Answer: B) Increases with temperature
27. Which of the following affects the rate of dissolution?
A) Particle size of solute
B) Temperature
C) Stirring
D) All of the above
Answer: D) All of the above
28. In which solution is the concentration expressed as mole fraction?
A) Molarity
B) Molality
C) Mole fraction solution
D) Mass percent
Answer: C) Mole fraction solution
29. Which of the following solutions is considered ideal?
A) Ethanol and water solution
B) Salt in water solution
C) Sugar in water solution
D) None
Answer: A) Ethanol and water solution
30. Which of the following statements is true about solubility?
A) Gas solubility decreases with pressure
B) Gas solubility increases with pressure
C) Gas solubility is independent of temperature
D) Solid solubility decreases with temperature
Answer: B) Gas solubility increases with pressure