Mixtures and Solutions

1. What is a mixture?

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

2. What is a colloid?

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

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

A) By filtration to remove the salt
B) By adding more water to dilute the salt
C) By evaporation, leaving behind salt crystals
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) Evaporation
C) Decantation
D) Filtration

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

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

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

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

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

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

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

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

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