11. The process of separating a liquid from a solid using filtration involves:

a) Evaporation
b) Distillation
c) Filtration
d) Centrifugation
Answer: c) Filtration

12. In distillation, the component of the mixture with the lowest boiling point:

a) Remains in the distillation flask
b) Condenses in the condenser
c) Is collected in the receiving flask
d) Does not evaporate
Answer: c) Is collected in the receiving flask

13. The purpose of using a burette in titration is to:

a) Measure the volume of a liquid accurately
b) Heat substances
c) Mix solutions
d) Separate solids from liquids
Answer: a) Measure the volume of a liquid accurately

14. In which technique is a centrifuge used to separate components of a mixture?

a) Filtration
b) Distillation
c) Centrifugation
d) Chromatography
Answer: c) Centrifugation

15. The process of heating a solution until the solvent evaporates is known as:

a) Filtration
b) Distillation
c) Evaporation
d) Sublimation
Answer: c) Evaporation

16. The main purpose of using an analytical balance is to:

a) Measure temperature
b) Determine the volume of a liquid
c) Measure mass with high precision
d) Mix chemicals
Answer: c) Measure mass with high precision

17. In which of the following techniques is a separating funnel used?

a) Filtration
b) Distillation
c) Liquid-liquid extraction
d) Chromatography
Answer: c) Liquid-liquid extraction

18. Which of the following is a common use of a pipette in chemistry?

a) Measuring solid samples
b) Heating solutions
c) Transferring a precise volume of liquid
d) Separating components of a mixture
Answer: c) Transferring a precise volume of liquid

19. What is the main principle behind chromatography?

a) Differential boiling points
b) Differential solubility and adsorption
c) Differential density
d) Differential temperature
Answer: b) Differential solubility and adsorption

20. The technique used to purify a solid by heating it until it melts and then cooling it slowly is called:

a) Filtration
b) Crystallization
c) Distillation
d) Sublimation
Answer: b) Crystallization