General Science #23 Multiple Choice Questions

GENERAL SCIENCE #23

MULTIPLE CHOICE QUESTIONS

1. Which of the following is a bad conductor of electricity?

(a) Distilled water

(b) Silver nitrate

(c) Sulphuric acid

(d) Copper sulphate

Answer: (a)

2. Which of the following does not conduct electricity?

(a) Sugar solution

(b) Vinegar solution

(c) Lemon juice solution

(d) Caustic soda solution

Answer: (a)

3. An electric current can produce which of the following?

(a) Heating effect

(b) Chemical effect

(c) Magnetic effect

(d) All of the above

Answer: (d)

4. Which of the following is a good conductor?

(a) Brick

(b) Steel

(c) Plastic

(d) Cotton

Answer: (b)

5. Electroplating is based on which of the following?

(a) Heating effect of electricity

(b) Chemical effect of electricity

(c) Physical effect of electricity

(d) Magnetic effect of electricity

Answer: (b)

6. 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

Answer: (d)

7. An electrolyte is ……………

(a) a metal

(b) a liquid that conducts current

(c) a non-metal

(d) None of the above

Answer: (b)

8. What is called flow of electron?

(a) Electrolyte

(b) Electroplating

(c) Electrodes

(d) Electric current

Answer: (d)

9. Which is not a non-electrolyte?

(a) Ethyl alcohol

(b) Sodium chloride

(c) Urea

(d) Sodium solution

Answer: (b)

10. An electric lamp glows due to which of the following?

(a) Heating effect

(b) Magnetic effect

(c) Chemical effect

(d) Physical effect

Answer: (a)

11. Electroplating prevents which of the following?

(a) Corrosion

(b) Passing of current

(c) Dissociation

(d) Shining

Answer: (a)

12. Which of the following is not used for electroplating metal articles?

(a) Nickel

(b) Silver

(c) Chromium

(d) Sodium

Answer: (d)

13. Iron objects can be protected by electroplating them with which of the following?

(a) Chromium

(b) Nickel

(c) Zinc

(d) All of the above

Answer: (d)

14. In LEDs, the longer lead (wire) is always connected to the …………… terminal.

(a) Negative

(b) Neutral

(c) Positive

(d) Any terminal

Answer: (c)

15. Why tap water is a good conductor of electricity while distilled water is not?

(a) Tap water contain salt

(b) Distilled water do not contain salt

(c) Only ‘a’

(d) Both ‘a’ and ‘b’

Answer: (b)

16. 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

Answer: (c)

17. 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

Answer: (a)

18. Why do we add little dilute sulphuric acid to copper sulphate solution during electroplating?

(a) To increase acidity

(b) To increase conductivity

(c) So that the colour becomes more prominent

(d) To burn copper sulphate

Answer: (b)

19. What is called the process of depositing a layer of any desired metal on another material by means of electricity?

(a) Electric plating

(b) Electroplating

(c) Electric depositing

(d) None of the above

Answer: (b)

20. Which one of the following is a poor conductor of electricity?

(a) Acidic solution

(b) Alkaline solution

(c) Common Salt solution

(d) Distilled water

Answer: (d)