Chemistry Practice Questions - Review Test #4
Try your skill.....test your knowledge.
Number your paper 1 - 25. All the following questions are multiple choice. Write your answer next to each number on your paper.
The answers to the questions are at the bottom of the quiz.
1. The equation used to convert Fahrenheit temperature to Celsius temperature is C = 5/9 X (Fahrenheit Temp. - 32) . If a Fahrenheit thermometer shows 110 degrees, what is the Celsius equivalent?
| A. 20 degrees Celsius |
| B. 43 degrees Celsius |
| C. 80 degrees Celsius |
| D. 110 degrees Celsius |
2. Isotopes are atoms of the same element with a different number of _________.
| A. neutrons. |
| B. electrons |
| C. ions. |
| D. metals |
3. Which type of graph would be MOST useful in comparing information about planets?
| A. pie graph showing density |
| B. scatter graph on number of asteroids |
| C. line graph on number of moons |
| D. bar graph comparing density and revolution |
4. Carbon's variety of bonds allows carbon-based molecules to have a wide variety of shapes and
| A. chemical properties. |
| B. chemical energy. |
| C. fission. |
| D. polymers. |
5. Which statement best explains why chemical equations are balanced?
| A. The bonds of the reactants equal the bonds of the products. |
| B. The mass of the reactants equals the mass of the products. |
| C. The energy of the reactants is not equal to the energy of the products. |
| D. The subscripts of the reactants equal the subscripts of the products. |
6. The four most common elements that make up living matter are hydrogen, carbon, _______ &________.
| A. nitrogen and uranium. |
| B. carbon dioxide and sulfur. |
| C. phosphorus and helium. |
| D. oxygen and nitrogen. |
7. Which of the following statements is true about density?
| A. It can be measured by total mass divided by total volume. |
| B. It can be measured by total volume divided by total mass. |
| C. The higher an object's density, the lower its mass per volume. |
| D. An object's density and its mass per volume are not related. |
8. What information about the compound C12H22O11 can be learned from the periodic table?
| A. the number of atoms in the compound |
| B. information about the elements. |
| C. the type of molecular bonding. |
| D. the usefulness of the compound. |
9. Elements that are similar to each other are usually located on the periodic table in the same _______.
| A. corner. |
| B. group. |
| C. period. |
| D. state. |
10. In a compost pile, organisms---including microorganisms, insects, and worms---decompose material from dead plants, returning nutrients to the soil. In a healthy compost pile, the compost is often more than 50 degrees warmer than the ground around the pile. What is the main reason for this?
| A. The sun shines on the compost, warming it up. |
| B. Plants in the compost pile take in energy from the Sun. |
| C. The chemical reactions involved in the decomposition of plant material release heat. |
| D. Decomposers require warm air to perform the chemical reactions that break down plant material |
11. The number of protons in the nucleus of an atom _________________________________________.
| A. is the density of the element. |
| B. is the atomic number. |
| C. is the total number of protons and electrons. |
| D. often changes. |
12. In a chemical reaction, the reactants are the elements or compounds on the left-hand side of the reaction equation. Which of the following is true about reactants?
| A. A reactant is a product in a chemical reaction |
| B. Reactants cannot react with each other. |
| C. Reactants are found in their original form in the products. |
| D. Reactants form the products of a chemical reaction. |
13. A group of students is experimenting with chemical reactions. They place a cup of baking soda in a large bowl. Then, the students pour a cup of white vinegar into the baking soda. They watch as the two substances bubble up and foam onto the table top. What do the students know about the total mass of the vinegar and the baking soda before and after the chemical reaction?
| A. The total mass stays the same, but the number of atoms changes. |
| B. The number of atoms stays the same, as does the total mass. |
| C. The conversion of matter changes the total mass of the reactants. |
| D. The chemical reaction reduces the total number of atoms. |
14. When the baking soda and vinegar are mixed, new compounds are formed. When these reactants combine, the resulting compound ____________.
| A. has properties that are different from the original elements. |
| B. has properties that remain the same throughout the chemical reaction. |
| C. is a mixture. |
| D. has properties that are termed isotopes. |
15. Molecular motion refers to the _________________________.
| A. position of a molecule on the periodic table. |
| B. motion of the neutrons in an atom. |
| C. movement of the molecules in a given state of matter |
| D. random order of elements. |
16. The particles of matter in a gas _____________________.
| A. are stable and do not move often. |
| B. are frozen in space and time. |
| C. lock together to form patterns. |
| D. move independently and collide frequently. |
17. Which object will float in water?
| A. a metal screw |
| B. a paper clip |
| C. a cork |
| D. a penny |
18. A science student measures the pH of a solution using a pH meter. The pH of the solution is 7. The solution is
| A. an acid. |
| B. a base. |
| C. neutral. |
| D. an acid-base pair. |
19. A student tested an unknown substance and determined the solution is basic. How did she determine this?
| A. The solution has a pH of >7 |
| B. She compared how the substance looked with an acidic substance. |
| C. She did not like how the substance smelled. |
| D. The solution has a pH of 7. |
20. The crystal structure of NaCl is an example of __________________________________________.
| A. a substance that is rare on Earth. |
| B. compounds forming solids by building up repeating patterns. |
| C. a liquid physical state. |
| D. atoms and molecules forming tetrahedral bonds. |
21. A group of workers is trying to find out the volume of a container. They determine that the area of the container is 20 square meters. The height of the container is 10 meters. What is the container's volume?
| A. 20 cubic meters. |
| B. 10 square meters. |
| C. 2000 meters 3. |
| D. 200 cubic meters. |
22. In a solid such as granite, the atoms that make up the solid are ________________________________________.
| A. free to move about and collide frequently. |
| B. connected loosely. |
| C. closely locked in position and can only vibrate. |
| D. unstable and change frequently. |
23. A chef heats a pot of water on the stove. The water soon reaches its boiling point. The boiling of water is an example of ______________________.
| A. a physical process. |
| B. a chemical reaction. |
| C. radioactive decay. |
| D. a nuclear reaction. |
24. Which of the following statements is true about atoms?
| A. All atoms are negatively charged. |
| B. An atom is made of protons, neutrons, and electrons. |
| C. An atom is composed of three elements. |
| D. All atoms have different neutrons. |
25. A student wants to calculate the density of 250 mL of salt water. Which formula should the student use?
| A. density = units of salt water/mass |
| B. density = rate (volume). |
| C. density = mass/volume. |
| D. density = mL/grams |
Answers:
|
# |
Answer |
|
1 |
B |
|
2 |
A |
|
3 |
C |
|
4 |
A |
|
5 |
B |
|
6 |
D |
|
7 |
A |
|
8 |
B |
|
9 |
B |
|
10 |
C |
|
11 |
B |
|
12 |
D |
|
13 |
B |
|
14 |
A |
|
15 |
C |
| 16 | D |
| 17 | C |
| 18 | C |
| 19 | A |
| 20 | B |
| 21 | D |
| 22 | C |
| 23 | A |
| 24 | B |
| 25 | C |