Mixtures and Solutions

1. What is a mixture?

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

2. What is a colloid?

A) A type of compound with strong chemical bonds
B) A pure substance that cannot be separated by physical means
C) A solution with maximum solubility
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 freezing the mixture to extract the salt
B) By filtration to remove the salt
C) By evaporation, leaving behind salt crystals
D) By adding more water to dilute the salt

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

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

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

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

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

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

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

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

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

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

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