MCQs
1. Non-ideal solutions show deviation from Raoult's law because:
A. Components have identical intermolecular forces
B. Intermolecular forces between components are different
C. The temperature is constant
D. Pressure is zero
2. Positive deviation from Raoult's law occurs when:
A. A‐B interactions are stronger than A‐A and B‐B
B. A‐B interactions are weaker than A‐A and B‐B
C. A‐B interactions are equal to A‐A and B‐B
D. No intermolecular forces exist
3. In positive deviation from Raoult's law, the vapour pressure of the solution is:
A. Lower than predicted
B. Equal to predicted
C. Higher than predicted
D. Zero
4. Negative deviation from Raoult's law occurs when:
A. A‐B interactions are stronger than A‐A and B‐B
B. A‐B interactions are weaker than A‐A and B‐B
C. A‐B interactions are absent
D. Temperature is very high
5. In non-ideal solutions, mixing of components usually results in:
A. No change in heat and volume
B. Change in heat and volume
C. Only temperature change
D. Only pressure change