Electroplating MCQs Class 8 Science
Electroplating – MCQs with Answers & Explanations
Class: 8 |
Subject: Science
Section: 14 – Chemical Effects of Electric Current
Topic: Electroplating
Board: CBSE Board Examination (Based on NCERT Syllabus)
Section: 14 – Chemical Effects of Electric Current
Topic: Electroplating
Board: CBSE Board Examination (Based on NCERT Syllabus)
1. Electroplating is the process of:
Answer: B
Electroplating deposits a thin layer of a desired metal over another using electric current and electrolyte solution.
Electroplating deposits a thin layer of a desired metal over another using electric current and electrolyte solution.
2. The object to be electroplated is connected to:
Answer: B — Cathode
Metal ions deposit on the cathode (negative electrode).
Metal ions deposit on the cathode (negative electrode).
3. The plating metal is connected to:
Answer: B — Anode
The plating metal dissolves into the solution from the anode.
The plating metal dissolves into the solution from the anode.
4. Solution used in electroplating is called:
Answer: B
Electrolyte contains ions of the plating metal.
Electrolyte contains ions of the plating metal.
5. Chromium plating is done on:
Answer: B
Chromium provides shine and corrosion resistance.
Chromium provides shine and corrosion resistance.
6. Electroplating prevents:
Answer: B
The coating protects base metal from rusting.
The coating protects base metal from rusting.
7. Gold plating is commonly done on:
Answer: B
Gold plating improves appearance and prevents tarnishing.
Gold plating improves appearance and prevents tarnishing.
8. The process uses which energy?
Answer: B
Electric current drives the chemical deposition reaction.
Electric current drives the chemical deposition reaction.
9. Example of electroplated object:
Answer: A
10. Electroplating improves:
Answer: D
11. Copper plating uses:
Answer: A
12. Cathode gains:
Answer: A
13. Anode loses:
Answer: A
14. Silver plating is done on:
Answer: A
15. Electroplating is a:
Answer: A
16. Nickel plating is used on:
Answer: A
17. Plating thickness depends on:
Answer: A
18. Electroplating uses:
Answer: A
19. Jewellery plating reduces:
Answer: C
20. Electroplating converts electrical energy into:
Answer: A
