CHEM 104 MODULE 4 PRACTICE EXAM
QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALES
2025
1. Which of the following is a strong electrolyte?
A) Glucose
B) Ethanol
C) NaCl
D) CH₃COOH
NaCl fully dissociates into Na⁺ and Cl⁻ in water, making it a strong electrolyte.
2. Which of the following would increase the solubility of a gas in a liquid?
A) Increasing the temperature
B) Increasing the pressure
C) Decreasing the pressure
D) Stirring vigorously
1|Page
,According to Henry’s Law, gas solubility increases with pressure.
3. A solution that contains less solute than it can hold at a given temperature
is:
A) Saturated
B) Unsaturated
C) Supersaturated
D) Concentrated
An unsaturated solution can still dissolve more solute.
4. Which of the following is not a colligative property?
A) Boiling point elevation
B) Freezing point depression
C) Color change
D) Osmotic pressure
Color change is not a property related to the number of solute particles.
5. What type of solution is formed when a solute and solvent form a
homogeneous mixture?
A) Suspension
B) Solution
C) Colloid
D) Emulsion
2|Page
, Solutions are homogeneous mixtures with particles at the molecular level.
6. Which compound is a weak acid?
A) HCl
B) HNO₃
C) H₂SO₄
D) HF
HF partially ionizes in water, classifying it as a weak acid.
7. Which solution would have the highest boiling point?
A) 1.0 M glucose
B) 1.0 M NaCl
C) 0.5 M MgCl₂
D) 0.5 M sucrose
NaCl dissociates into two ions, elevating the boiling point more than non-
electrolytes like glucose.
8. The pH of a 0.001 M HCl solution is:
A) 1
B) 4
C) 3
D) 5
3|Page
QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALES
2025
1. Which of the following is a strong electrolyte?
A) Glucose
B) Ethanol
C) NaCl
D) CH₃COOH
NaCl fully dissociates into Na⁺ and Cl⁻ in water, making it a strong electrolyte.
2. Which of the following would increase the solubility of a gas in a liquid?
A) Increasing the temperature
B) Increasing the pressure
C) Decreasing the pressure
D) Stirring vigorously
1|Page
,According to Henry’s Law, gas solubility increases with pressure.
3. A solution that contains less solute than it can hold at a given temperature
is:
A) Saturated
B) Unsaturated
C) Supersaturated
D) Concentrated
An unsaturated solution can still dissolve more solute.
4. Which of the following is not a colligative property?
A) Boiling point elevation
B) Freezing point depression
C) Color change
D) Osmotic pressure
Color change is not a property related to the number of solute particles.
5. What type of solution is formed when a solute and solvent form a
homogeneous mixture?
A) Suspension
B) Solution
C) Colloid
D) Emulsion
2|Page
, Solutions are homogeneous mixtures with particles at the molecular level.
6. Which compound is a weak acid?
A) HCl
B) HNO₃
C) H₂SO₄
D) HF
HF partially ionizes in water, classifying it as a weak acid.
7. Which solution would have the highest boiling point?
A) 1.0 M glucose
B) 1.0 M NaCl
C) 0.5 M MgCl₂
D) 0.5 M sucrose
NaCl dissociates into two ions, elevating the boiling point more than non-
electrolytes like glucose.
8. The pH of a 0.001 M HCl solution is:
A) 1
B) 4
C) 3
D) 5
3|Page
