CHEM 134 C002 – Spring 2026 Digital ColligativE
propErtiES (BEyonD laBS) – WrittEn ExaM
praCtiCE 50 QUEStionS + anSWErS alrEaDy
graDED a+
Questions
1.
Which property is NOT a colligative property?
A. Osmotic pressure
B. Vapor pressure lowering
C. Freezing point depression
D. Density
Answer: D
Rationale: Density depends on the identity of substances, whereas colligative properties
depend primarily on the number of dissolved particles.
2.
Freezing point depression occurs because:
A. Solute particles increase crystal formation
B. Solute particles interfere with solvent crystallization
C. Solute particles raise vapor pressure
D. Solvent particles disappear
Answer: B
Rationale: Dissolved particles disrupt formation of the solvent crystal lattice, requiring a lower
temperature for freezing.
3.
The equation for freezing point depression is:
, A. PV=nRT
B. ΔTf = Kfm
C. M=n/V
D. q=mcΔT
Answer: B
Rationale: Freezing point depression is directly proportional to molality.
4.
What does Kf represent?
A. Freezing point constant
B. Equilibrium constant
C. Rate constant
D. Density constant
Answer: A
5.
Molality is expressed as:
A. mol/L solution
B. mol/kg solvent
C. g/L solution
D. mol/g solution
Answer: B
6.
Which solution exhibits the greatest freezing point depression?
A. 0.1 m glucose
B. 0.1 m sucrose
C. 0.1 m NaCl
D. Pure water
Answer: C
propErtiES (BEyonD laBS) – WrittEn ExaM
praCtiCE 50 QUEStionS + anSWErS alrEaDy
graDED a+
Questions
1.
Which property is NOT a colligative property?
A. Osmotic pressure
B. Vapor pressure lowering
C. Freezing point depression
D. Density
Answer: D
Rationale: Density depends on the identity of substances, whereas colligative properties
depend primarily on the number of dissolved particles.
2.
Freezing point depression occurs because:
A. Solute particles increase crystal formation
B. Solute particles interfere with solvent crystallization
C. Solute particles raise vapor pressure
D. Solvent particles disappear
Answer: B
Rationale: Dissolved particles disrupt formation of the solvent crystal lattice, requiring a lower
temperature for freezing.
3.
The equation for freezing point depression is:
, A. PV=nRT
B. ΔTf = Kfm
C. M=n/V
D. q=mcΔT
Answer: B
Rationale: Freezing point depression is directly proportional to molality.
4.
What does Kf represent?
A. Freezing point constant
B. Equilibrium constant
C. Rate constant
D. Density constant
Answer: A
5.
Molality is expressed as:
A. mol/L solution
B. mol/kg solvent
C. g/L solution
D. mol/g solution
Answer: B
6.
Which solution exhibits the greatest freezing point depression?
A. 0.1 m glucose
B. 0.1 m sucrose
C. 0.1 m NaCl
D. Pure water
Answer: C
