Instructions: Write the letter of the correct answer before each number.

____1. How do you classify mixtures with uniform properties?

A. heterogeneous B. homogeneous C. pure substances D. none of the above

____2. Which statement best describe heterogeneous mixture?

A. uniform in appearance C. non-uniform in appearance

B. solvents completely dissolved D. particles cannot be distinguished

____3. Which of the following is a heterogeneous mixture?

A. vinegar B. salt solution C. iced tea drink D. garbage in a landfill

____4. In which of these combined substances can components still be identified?

A. water and salt B. rice grains and sand C. vinegar and soy sauce D. powdered milk and water

____5. All of the given mixtures are homogeneous, except ?

A. air B. beach sand C. orange juice D. soft drink

____6. When oil is added to water, _ .

A. a miscible solution is created C. a mixture with one phase is seen

B. homogeneous mixture is formed D. the oil floats because it’s less dense

____7. What is produced when carbon dioxide and water are combined?

A. gas in liquid C. solid in liquid

B. gas in gas D. liquid in liquid

____8. When salt dissolves in water, the two substances appear as one. What kind of solution is this?

A. gas in liquid C. solid in liquid

B. liquid in liquid D. solid in solid

____9. Which of the following forms an immiscible solution?

A. oil and alcohol B. sugar and water C. vinegar and soy sauce D. water and gasoline

____10. Which of the following is a type of colloids?

A. air B. foam C. vinegar D. yeast

____11. Which material below is an emulsion?

A. blood B. butter C. cream D. mayonnaise

____12. What word describes a suspension mixtures?

A. clean B. clear C. cloudy D. dirty

____13. Suspension is a mixture.

A. concentrated B. diluted C. heterogeneous D. homogeneous

____14. Which describes evaporation?

A. gas changes into a liquid C. liquid changes into a solid

B. liquid changes into a gas D. gas changes into a solid

____15. What process is involved for a white glue to harden eventually?

A. decantation B. distillation C. evaporation D. filtration

____16. What will you do to remove oil from water?

A. boil the water B. use a stirrer C. use a strainer D. pour out the oil

____17. How do you separate gasoline from water?

A. decantation B. distillation C. evaporation D. filtration

____18. How can we separate sugar and flour?

A. filtering B. sieving C. magnet D. decantation

____19. If Joy wants to get the iron filings out of some sand, what could she use to separate this mixture?

A. decanting B. evaporation C. magnet D. sieving

____20. Which process of separating solid substances from a liquid uses of filter paper or any fine cloth?

A. filtering B. picking C. sieving D. sifting

____21. Which is an example of a mixture?

A. salt B. soft drink C. sugar D. water

____22. Which of these mixtures has harmful effects?

A. oil spill in bodies of water C. bleach for laundry

B. decayed matter in the soil D. rubbing alcohol

____23. Which of the following liquids do not mix with water?

A. acetone B. alcohol C. gasoline D. wine

____24. What do you call the substances that usually dissolve solid materials?

A. emulsifier B. mixtures C. solute D. solvent

____25. Which describes evaporation?

A. gas changes into a liquid C. liquid changes into a solid

B. liquid changes into a gas D. gas changes into a solid

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