7. Which of the following is NOT a characteristic of a compound?

C. the smallest unit of a compound is an atom

A. has different properties from the elements that formed it

B. pure substance made of two or more elements

D. can be represented by a chemical formula

8. Which of the following statements is true about a physical property?

C. It can be observed without changing the chemical composition of a substance.

A. It can only be observed during a chemical reaction.

B. It describes the ability of a substance to undergo a chemical change.

D. It is always related to the substance's ability to burn.

12. Which of the following is an example of a chemical change?

B. mixing chocolate syrup and milk

13. Which of the following is a way in which elements and compounds are similar?

A. elements and compounds are both pure substances

B. elements and compounds are both listed on the periodic table.

C. Elements and compounds are both made up of different kinds of atoms.

D. Elements and compounds can both be broken down by physical changes.

14. 5 grams of baking soda and 20 grams of vinegar are added together. A bubbling reaction starts. When it is over, the solution weighs 24 grams. Why has the weight changed?

A. A gas has formed and left the mixture.

C. The new solution was lighter.

D. Baking soda is lighter when dissolved in vinegar.

15. A beaker containing ice and water is placed on a warm hotplate. Will the ice in the beaker undergo a physical or chemical change?

A. a physical change because it will change state

B. a chemical change because it will change state

C. a physical change because it will form a new substance

D. a chemical change because it will form a new substance

17. Examples of chemical properties include:

B. radioactivity and reactivity

D. melting point and boiling point

18. In a solution where carbon dioxide (CO₂) is dissolved in water, which is the solute and which is the solvent?

A. Carbon dioxide is the solute, and water is the solvent.

B. Water is the solute, and carbon dioxide is the solvent.

C. Both carbon dioxide and water are solutes.

D. Both carbon dioxide and water are solvents.

20. A student measures 10 ml of liquid silver nitrate and then adds it to a solution of liquid potassium chloride. The reaction that results produces a solid. Given this information, what sign of a chemical reaction can be observed?

D. a change in odor is detected

21. Which of the following combinations is a mixture rather than a compound?

B. hydrogen and oxygen in water(H2O)

C. sodium and chlorine in salt (NaCl)

D. nitrogen and hydrogen in ammonia (NH3)

22. Mark made observations as he watched a white candle burn. Which of Mark’s observations would show that a burning candle is a chemical reaction?

A. Black smoke is given off; hot gasses are rising.

C. The candle is white and made of wax and a wick.

D. Time passes one minute at a time.

23. Mark made observations as he watched a white candle burn. Which of Mark’s observations would show that a burning candle has physical changes?

A. Black smoke is given off; hot gasses are rising.

C. The flame glows red and orange.

D. Time passes one minute at a time.

24. In a solution where sugar is dissolved in tea, which is the solute and which is the solvent?

A. Sugar is the solute, and tea is the solvent.

B. Tea is the solute, and sugar is the solvent.

C. Both sugar and tea are solutes.

D. Both sugar and tea are solvents.

25. During a laboratory experiment, two clear colorless solutions, Solution A (containing silver nitrate, AgNO₃) and Solution B (containing sodium chloride, NaCl), are mixed together. After mixing, a white solid forms at the bottom of the container and bubbles form at the top of the substance. What can you conclude from the formation of the white solid in the experiment?

B. A chemical reaction occurred, and a precipitate was formed.

A. A physical change occurred because the liquids mixed.

C. No reaction occurred, the substances just combined.

D. A gas was produced, and the liquid turned cloudy.

Chemistry Unit Test

Quiz

•

others

•

Practice Problem

•

Hard

Laura Hovey

FREE Resource

31 questions

Show all answers

1.

OPEN ENDED QUESTION

30 sec • Ungraded

Please write your full name below.

Evaluate responses using AI:

OFF

2.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

1. Based on the model, what is the chemical formula of butane?

A. C3H8

B. C3H10

C. C4H10

D. C3H12

3.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

2. What is the correct classification for carbon dioxide (CO₂)?

A. element

B. compound

C. mixture

D. Both B and C

4.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

3. A compound is

A. A substance made up of two or more atoms joined by chemical bonds.

B. Two substances not chemically combined.

C. A substance that cannot be separated even by a chemical reaction.

D. Two substances that can be joined together by physical means.

5.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

4. A molecule is

A. the smallest particle of an atom

B. has no charge and lives in the nucleus.

C. a subatomic particle with a negative charge.

D. the smallest unit of a compound

6.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

5. Which of the following is an example of a molecule?

A. Gold (Au)

B. Chlorine (Cl₂)

C. Water (H₂O)

D. Both B and C

7.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

6. All of the following describe a physical property EXCEPT?

A. color

B. density

C. reactivity

D. solubility

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Chemistry Unit Test

31 questions

Please write your full name below.

1. Based on the model, what is the chemical formula of butane?

2. What is the correct classification for carbon dioxide (CO₂)?

3. A compound is

4. A molecule is

5. Which of the following is an example of a molecule?

6. All of the following describe a physical property EXCEPT?

7. Which of the following is NOT a characteristic of a compound?

8. Which of the following statements is true about a physical property?

9. In a reaction lithium sulfide is produced by combining lithium with sulfur. The mass of lithium is 12.3 g and the mass of sulfur is 10.1 g. What is the mass for the lithium sulfide that is produced?

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