Class 8 Science MCQ Chapter 14 Chemical Effects Of Electric Current Solutions in English Medium, Class 8 Science Multiple Choice Question Answer in English to each chapter is provided in the list so that you can easily browse throughout different chapters Class 8 Science MCQ Chapter 14 Chemical Effects Of Electric Current Notes and select need one.
Class 8 Science MCQ Chapter 14 Chemical Effects Of Electric Current
Also, you can read the SCERT book online in these sections Class 8 Science Objective Type Solutions by Expert Teachers as per SCERT (CBSE) Book guidelines. These solutions are part of SCERT All Subject Solutions. Here we have given Assam Class 8 Science MCQs Solutions in English for All Subject, You can practice these here.
Chemical Effects Of Electric Current
Chapter – 14
| MCQ |
1. Which of the following is a bad conductor of electricity?
(a) Distilled water.
(b) Silver nitrate.
(c) Sulphuric acid.
(d) Copper sulphate.
Ans: (a) Distilled water.
2. Which of the following does not conduct electricity?
(a) Sugar solution.
(b) Vinegar solution.
(c) Lemon juice solution.
(d) Caustic soda solution.
Ans: (a) Sugar solution.
3. An electric current can produce.
(a) Heating effect.
(b) Chemical effect.
(c) Magnetic effect.
(d) all of these.
Ans: (d) all of these.
4. Pure or distilled water is a:
(a) Poor conductor.
(b) Good conductor.
(c) Both (a) and (b).
(d) None of these.
Ans: (a) poor conductor.
5. Which of the following is a good conductor?
(a) Brick.
(b) Steel.
(c) Plastic.
(d) Cotton.
Ans: (b) Steel.
6. Polythene is:
(a) a conductor.
(b) An insulator.
(c) Both (a) and (b).
(d) None of these.
Ans: (b) an insulator.
7. Electroplating is based on.
(a) Heating effect of electricity.
(b) Chemical effect of electricity.
(c) Physical effect of electricity.
(d) Magnetic effect of electricity.
Ans: (b) Chemical effect of electricity.
8. Copper is.
(a) a good conductor.
(b) an insulator.
(c) both (a) and (b).
(d) none of these.
Ans: (a) a good conductor.
9. Waste from an electroplating factory must be disposed off:
(a) In the nearby river.
(b) In the nearby pond.
(c) In the nearby cornfield.
(d) According to the disposal guidelines of Waste Management Bodies.
Ans: (d) according to the disposal guidelines of Waste Management Bodies.
10. An electrolyte is:
(a) a metal.
(b) a liquid that conducts current.
(c) a non-metal.
(d) none of these.
Ans: (b) a liquid that conducts current.
11. Flow of electron is called:
(a) electrolyte.
(b) Electroplating.
(c) Electrodes.
(d) Electric current.
Ans: (d) electric current.
12. Which is not a nonelectrolyte?
(a) Ethyl alcohol.
(b) Sodium chloride.
(c) Urea.
(d) Sodium solution.
Ans: (b) Sodium chloride.
13. An electric lamp glows due to:
(a) Heating effect.
(b) Magnetic effect.
(c) Chemical effect.
(d) Physical effect.
Answer: (a) heating effect.
14. Electroplating prevents.
(a) Corrosion.
(b) Passing of current.
(c) Dissociation.
(d) Shining.
Ans: (a) corrosion.
15. Which of the following is not used for electroplating metal articles?
(a) Nickel.
(b) Silver.
(c) Chromium.
(d) Sodium.
Ans: (d) Sodium.
16. Iron objects can be protected by electroplating them with:
(a) Chromium.
(b) Nickel.
(c) Zinc.
(d) all of these.
Ans: (d) all of these.
17. In LEDs, the longer lead (wire) is always connected to the ________________ terminal.
(a) Negative.
(b) Neutral.
(c) positive.
(d) Any terminal.
Ans: (c) positive.
18. Tap water is a good conductor of electricity while distilled water is not because.
(a) Tap water contain salts.
(b) Distilled water do not contain salt.
(c) Only (a) is correct.
(d) Both (a) & (b) is correct.
Ans: (b) Distilled water do not contain salt.
19. When electrodes are immersed in water and electricity passed, the bubbles formed on the positive terminal is actually gas.
(a) Hydrogen.
(b) Carbon dioxide.
(c) Oxygen.
(d) Nitrogen.
Ans: (c) Oxygen.
20. When electrodes are immersed in water and electricity passed, the bubbles formed on the negative terminal is actually _______________ gas.
(a) Hydrogen.
(b) Carbon dioxide.
(c) Oxygen.
(d) Nitrogen.
Ans: (a) Hydrogen.
