MCQs
1. A homogeneous mixture is one in which:
A. Components are visible separately
B. Composition is uniform throughout
C. It can be separated by hand picking
D. It always contains solids only
2. Which of the following is a homogeneous mixture?
A. Sand and marble
B. Oil and water
C. Salt dissolved in water
D. Soil
3. A heterogeneous mixture:
A. Has uniform composition
B. Cannot be separated physically
C. Has non-uniform composition
D. Contains only liquids
4. Which method is suitable for separating a heterogeneous mixture?
A. Distillation
B. Filtration
C. Crystallization
D. Sublimation
5. Which of the following is a heterogeneous mixture?
A. Sugar solution
B. Air
C. Alloy
D. Sand and marble
6. The substances that make up a solution are called:
A. Elements
B. Compounds
C. Components
D. Phases
7. In a solution, the component present in the largest amount is called:
A. Solute
B. Solvent
C. Mixture
D. Medium
8. The physical state of a solution is determined by:
A. Solute
B. Temperature
C. Solvent
D. Pressure
9. The substance dissolved in a solution is called:
A. Solvent
B. Solute
C. Component
D. Medium
10. Which of the following correctly identifies solute and solvent?
A. Sugar (solute), water (solvent)
B. Water (solute), sugar (solvent)
C. Both are solutes
D. Both are solvents
11. Which mixture can be separated by magnetic separation?
A. Sugar and water
B. Sand and marble
C. Iron filings and sand
D. Oil and water
12. Air is considered a homogeneous mixture because:
A. It contains only gases
B. Its composition is uniform
C. It is pure
D. It cannot be separated
13. Which statement is incorrect?
A. Homogeneous mixtures have uniform composition
B. Heterogeneous mixtures have distinct components
C. Solute is always present in larger amount
D. Solvent determines physical state