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- 1. Multiple Choice
Electroplating is based on ___________of an electric current.
Physical effect
Chemical effect
Heating effect
Magnetic effect
- 2. Multiple Choice
Adding common salt to distilled water makes it
Good Conductor
Poor Conductor
No change
Both A and B
- 3. Multiple Choice
An electrolyte is
a metal
a solution
a liquid that conducts electricity
none of these
- 4. Multiple Choice
Flow of electrons is called
Electrode
Electrolyte
Electric current
Electroplating
- 5. Multiple Choice
Tick the chemical effect of elecric current
boiling
motion
electro shock
Electroplating
- 6. Multiple Choice
Who discovered chemical effect of elecric current?
Thomas Edison
Joule-Lenz
Michael Faraday
James Watt
- 7. Multiple Choice
Boojho’s uncle has set up an electroplating factory near his village. He should dispose off the waste of the factory
in the nearby river.
in the nearby pond.
in the nearby cornfield.
according to the disposal guidelines of the local authority.
- 8. Multiple Choice
Which one of the following solutions will not conduct electricity?
lemon juice
vinegar
tap water
vegetable oil
- 9. Multiple Choice
Which of the following solutions will not make the bulb in Fig 14.2 glow?
(a)
(b)
(c)
(d)
sodium chlorides
copper sulphate
silver nitrate
sugar solution in diluted water
- 10. Multiple ChoiceWhich of the following statements is incorrect about the conductivity of water?Rain water is a good conductor of electricity.On addition of table salt, water conducts electricity.On addition of lemon juice, water conducts electricity.Water becomes a good conductor of electricity when heated.
- 11. Multiple Choice
LED stands for
light emitting diode
light efficient diode
length emitting diode
light emitting device
- 12. Multiple Choice
Sugar solution is a good conductor of electricity.
True
False
- 13. Multiple Choice
the phenomenon of decomposition of an electrolyte when electricity is passed through is known as
conduction
coating
electrolysis
electrorefining
- 14. Multiple Choice
Electroplating prevents
electric current
chemical effect
lightening
rusting
- 15. Multiple Choice
Which of these is plated on the iron to prevent it from chemically reacting with food?
Gold
Chromium
Tin
Zinc
- 16. Multiple Choice
Out of the following, which metal is used to electroplate iron to make it shining and rust resistant?
Gold
Chromium
Zinc
Tin
- 17. Multiple Choice
Chromium corrodes easily.
True
False
- 18. Multiple Choice
Who discovered heating effect of elecric current?
James Watt
Joule-Lenz
Michael Faraday
Thomas Edison
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