Gauge Multiple Choice:
Read each item carefully. Write the letter of the correct answer in a separate sheet of paper.
1. Which of these statements correctly describes a mixture?
A. A mixture is a combination of two or more substances that are chemically combined.
B. A mixture consists of two or more substances that are physically combined. C. A mixture is made up of different elements and compounds.
D. A mixture is composed of one kind of matter.
2. A salt solution is composed of salt and water. What is the process used for separating salt from water in the solution?
A. decantation
B. evaporation
C. filtration
D. mechanical separation
3. Which of the following describes a heterogeneous mixture?
A. Particles can be seen settled at the bottom of a container.
B. Has one observable phase.
C. Uniform in appearance.
D. Clear in appearance.
4. Which of the following is an example of a pure substance?
A. Air
B. Stainless steel
C. Sugar
D. Vinegar
5. Clear water may be collected from muddy water. Place a glass of nuddy water on top of a table. Allow the mud to settle. What do you call this method of separation?
A. decantation
B. evaporation
C. filtration
D. use of magnets
6. Which staternent is CORRECT regarding pure substances?
A. Pure substances can be further broken down into simpler substances.
B. Pure substances are physical combinations of two or more elements.
C.Pure substances have definite boiling and melting points.
D. Pure substances maybe homogeneous or heterogeneous.
7. Which of the following is a property of mixture?
A. It can be physically separated into its components.
B. It consists of elements and
compounds.
C. It is made up of one kind of matter.
D. It has a definite composition.
8. Which is the best way to determine whether an unknown sample is a substance or a mixture?
A. testing its melting and boiling points
B. observing its physical appearance
C. tasting the given sample
D. knowing its density
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Answer:
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Explanation:
1.a
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Answers
1. A
2. C
3. B
4. A
5. D
6. B
7. D
8. A
9. D
10. A
Explanation