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Mixtures and Solutions
  • 1. What is a mixture?
A) A combination of two or more substances that are physically combined
B) A pure substance composed of only one type of atom
C) A chemical bond between two substances
D) A single substance with uniform composition
  • 2. What is a colloid?
A) A solution with maximum solubility
B) A pure substance that cannot be separated by physical means
C) A type of compound with strong chemical bonds
D) A mixture in which one substance is dispersed evenly throughout another substance
  • 3. How can you separate a mixture of saltwater into salt and water?
A) By adding more water to dilute the salt
B) By evaporation, leaving behind salt crystals
C) By filtration to remove the salt
D) By freezing the mixture to extract the salt
  • 4. Which method can be used to separate a mixture of sand and water?
A) Chromatography
B) Decantation
C) Evaporation
D) Filtration
  • 5. What is the term for a solution in which no more solute can be dissolved?
A) Saturated solution
B) Unsaturated solution
C) Dilute solution
D) Supersaturated solution
  • 6. What is the term for a mixture that has visible particles that settle over time?
A) Buffer solution
B) Suspension
C) Emulsion
D) Alloy
  • 7. How does adding more solute to a solvent affect the freezing point of a solution?
A) It has no effect on the freezing point
B) It causes the solution to solidify instantly
C) It lowers the freezing point of the solution
D) It raises the freezing point of the solution
  • 8. When a mixture is heated to separate its components, what is this process called?
A) Distillation
B) Decantation
C) Filtration
D) Chromatography
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