Separating Mixtures Quiz
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5 questions, one answer each
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1. What does filtration separate?
- A. Two miscible liquids
- B. An insoluble solid from a liquid
- C. A dissolved solute from its solvent
- D. Two gases
2. Which technique is used to obtain solid crystals of a dissolved salt from its solution?
- A. Filtration
- B. Crystallisation
- C. Chromatography
- D. Flame testing
3. What property difference does distillation exploit to separate substances?
- A. Colour
- B. Boiling point
- C. Density
- D. Solubility in acid
4. A student wants to obtain pure water from seawater. Which technique is most suitable?
- A. Filtration
- B. Crystallisation
- C. Distillation
- D. Flame test
5. A mixture contains an insoluble solid suspended in a liquid, and the liquid itself is a solution of a dissolved salt. Which two-step approach would fully separate all three components (insoluble solid, salt, pure liquid)?
- A. Distillation only
- B. Filtration first, then crystallisation or distillation on the filtrate
- C. Crystallisation only, no filtration needed
- D. Chromatography followed by flame testing