Chemistry Practice Questions - Review Test #5
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. In a liquid such as water, the molecules that make up the liquid ________________________________.
| A. are closely locked into position. |
| B. can only vibrate. |
| C. are loosely connected and can collide with and move past one another. |
| D. change as the liquid changes physical states. |
2. A teacher is showing the class how to classify substances by their ability to conduct heat and electricity. Which would BEST conduct heat and electricity?
| A. copper. |
| B. wood. |
| C. fabric. |
| D. cork. |
3. Which group of molecules is found in all living organisms?
| A. hydrocarbons, sugars and photosynthesis |
| B. fats. proteins and carbohydrates |
| C. water, salt and reactants |
| D. uranium, gold, and carbon |
4. Which subatomic particle occupies the cloudlike space that surrounds the atom's core?
| A. quarks |
| B. neutrons |
| C. protons |
| D. electrons |
5. Chromium, Cr is a(n) ___________.
| A. compound. |
| B. element. |
| C. mixture. |
| D. synthetic. |
6. At room temperature, which material MOST likely does not have a structure made up of a repeating pattern of atoms or molecules?
| A. diamond |
| B. plastic |
| C. molasses |
| D. sugar |
7. The elements in the compound sodium hydrogen carbonate, NaHCO3, are sodium, hydrogen and ________________.
| A. carbonate. |
| B. cobalt. |
| C. carbon and oxygen. |
| D. carbon dioxide. |
8. Which substance contains the element nitrogen?
| A. tin phosphide, SnP |
| B. potassium iodide, KI |
| C. nickel oxide, NiO |
| D. nitric oxide, NO |
9. A neutral atom of copper has 29 protons and 31 neutrons. How many electrons does it have?
| A. 2 |
| B. 29 |
| C. 31 |
| D. 60 |
10. Sodium is added to a fluorine to create the substance sodium fluoride. NaF. Sodium fluoride is a(n) ________________.
| A. atom. |
| B. compound. |
| C. element. |
| D. mixture. |
11. Water is a compound because it is
| A. a liquid at room temperature. |
| B. made up of two elements that are chemically bonded together. |
| C. necessary for photosynthesis. |
| D. used to dissolve minerals. |
12. How many different types of elements are in the compound formaldehyde, HCHO?
| A. two |
| B. three |
| C. four |
| D. six |
13. What group or family on the periodic table represents elements that are classified as inert gases?
| A. 1 |
| B. 2 |
| C. 17 |
| D. 18 |
14. Which element has an atomic number of 48?
| A. lead |
| B. silver |
| C. cadmium |
| D. chromium |
15. Chlorine is often used in weed-killing sprays. Some environmentalists have concerns about the use of chlorine. Which element on the periodic table has properties that are similar to chlorine and could possibly be substituted for chlorine in the week-killing spray?
| A. magnesium |
| B. carbon |
| C. chromium |
| D. bromine |
16. Atoms of the same element with differing numbers of neutrons are ___________________.
| A. metals. |
| B. ions. |
| C. isotopes. |
| D. reactants. |
17. What do isotopes of zinc and silver have in common?
| A. Atoms of both elements have the same number of neutrons. |
| B. Both have odd atomic numbers. |
| C. Both have similar physical properties. |
| D. They share the same atomic symbol. |
18. Which scenario always indicates that a chemical reaction has taken place?
| A. A substance changes from solid to liquid. |
| B. A new substance is produced. |
| C. A substance changes size. |
| D. A substance changes into a different shape. |
19. If a catalyst is added to a substance and the temperature goes up, what kind of reaction is shown?
| A. catalytic |
| B. endothermic |
| C. enzymatic |
| D. exothermic |
20. Which process shows a material change form with NO chemical reaction?
| A. A loaf of bread bakes in an oven. |
| B. A pot of water boils on the stove. |
| C. A piece of paper burns into ash. |
| D. Vinegar mixes with baking soda. |
21. Pickled foods often taste sour. From this information you can infer that one of the ingredients used in pickling is
| A. a sugar. |
| B. an acid. |
| C. a base. |
| D. water. |
22. Household solutions that contain bases often feel
| A. dense. |
| B. gritty. |
| C. slippery. |
| D. warm. |
23. Sodium metal reacts with fluorine gas to form sodium fluoride (NaF). What can you infer about the properties of sodium fluoride? It has
| A. many of the properties of sodium. |
| B. many of the properties of fluorine. |
| C. a combination of the properties of sodium and fluorine. |
| D. different properties than sodium and fluorine. |
24. During a chemical reaction, 20 grams of zinc sulfide (ZnS) break down into the elements from which it was formed. Which statement is true about the products?
| A. More zinc atoms are formed than sulfur atoms. |
| B. 10 grams of zinc and 10 grams of sulfur are formed. |
| C. The total mass of the products is 20 grams. |
| D. 20 grams of zinc and 20 grams of sulfur are formed. |
25. A drop of solution turns blue litmus paper red. The solution
| A. is basic. |
| B. is acidic. |
| C. is the product of a neutralization reaction. |
| D. will cause red litmus paper to turn white. |
Answers:
|
# |
Answer |
|
1 |
C |
|
2 |
A |
|
3 |
B |
|
4 |
D |
|
5 |
B |
|
6 |
C |
|
7 |
C |
|
8 |
D |
|
9 |
B |
|
10 |
B |
|
11 |
B |
|
12 |
B |
|
13 |
D |
|
14 |
C |
|
15 |
D |
| 16 | C |
| 17 | C |
| 18 | B |
| 19 | B |
| 20 | B |
| 21 | B |
| 22 | C |
| 23 | D |
| 24 | C |
| 25 | B |