Chemical Effects of Electric Current

Grade 7 Science — Chemical Effects of Electric Current: 25 practice questions with instant scoring and explanations.

1. Electric current can pass through
2. Which is a conductor of electricity in liquids?
3. Electroplating is used to
4. In electroplating, the object to be coated is made the
5. The metal that deposits on the cathode during electroplating comes from the
6. Electroplating is commonly used for
7. LED test shows conductivity by
8. An electrochemical cell converts
9. A battery is an example of
10. Copper sulfate solution is a
11. The positive electrode in an electrochemical cell is called the
12. Ions are
13. During electrolysis, the negative electrode is the
14. Electroplating requires
15. What happens when electric current passes through copper sulfate solution?
16. Rusting of iron can be prevented by
17. A voltmeter measures
18. An ammeter measures
19. Pure water is a
20. The anode in electroplating is made of
21. Hydrochloric acid solution conducts electricity because it
22. When a battery is connected to a solution with electrodes, current flows because
23. The process of coating steel with zinc is called
24. A dry cell is an example of
25. Electrolyte is a substance that