Mixtures and Solutions

1. What is a mixture?

A) A single substance with uniform composition
B) A pure substance composed of only one type of atom
C) A combination of two or more substances that are physically combined
D) A chemical bond between two substances

2. What is a colloid?

A) A mixture in which one substance is dispersed evenly throughout another substance
B) A pure substance that cannot be separated by physical means
C) A solution with maximum solubility
D) A type of compound with strong chemical bonds

3. How can you separate a mixture of saltwater into salt and water?

A) By evaporation, leaving behind salt crystals
B) By filtration to remove the salt
C) By freezing the mixture to extract the salt
D) By adding more water to dilute the salt

4. What is the term for a solution in which no more solute can be dissolved?

A) Supersaturated solution
B) Unsaturated solution
C) Saturated solution
D) Dilute solution

5. What is the term for a mixture that has visible particles that settle over time?

A) Suspension
B) Emulsion
C) Buffer solution
D) Alloy

6. How does adding more solute to a solvent affect the freezing point of a solution?

A) It raises the freezing point of the solution
B) It causes the solution to solidify instantly
C) It has no effect on the freezing point
D) It lowers the freezing point of the solution

7. Which method can be used to separate a mixture of sand and water?

A) Filtration
B) Decantation
C) Chromatography
D) Evaporation

8. When a mixture is heated to separate its components, what is this process called?

A) Chromatography
B) Distillation
C) Decantation
D) Filtration

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