Have an account?
Skip to Content
Build your own quiz
20 questions
Show Answers
See Preview
- 1. Multiple Choice
Which of the following does not conduct electricity?
Sugar solution
Vinegar solution
Lemon juice solution
Caustic soda solution
- 2. Multiple Choice
An electric current can produce
heating effect
chemical effect
magnetic effect
all of the above
- 3. Multiple Choice
Pure or distilled water is a
poor conductor
good conductor
Both
None of the above
- 4. Multiple Choice
Why do we add little dilute sulphuric acid to copper sulphate solution during electroplating?
To increase acidity
To increase conductivity
So that the colour becomes more prominent
To burn copper sulphate
- 5. Multiple Choice
Which of the following is a bad conductor of electricity?
Distilled water
Silver nitrate
Sulphuric acid
Copper sulphate
- 6. Multiple Choice
Electroplating is based on ___________of an electric current.
Physical effect
Chemical effect
Heating effect
Magnetic effect
- 7. Multiple Choice
Which of these is plated on the iron to prevent it from chemically reacting with food?
Gold
Chromium
Tin
Zinc
- 8. Multiple Choice
Electroplating prevents
electric current
chemical effect
lightening
rusting
- 9. Multiple Choice
Out of the following, which metal is used to electroplate iron to make it shining and rust resistant?
Gold
Chromium
Zinc
Tin
- 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
Alloys of metals
allow electric current to flow through them
do not allow electric current to flow through them
sometimes allow and sometimes do not allow electric current to flow through them
None of these
- 12. Multiple Choice
Tin cans used for storing food are made by electroplating
copper on iron
iron on tin
tin on zinc
tin on iron
- 13. Multiple Choice
The filament of the bulb gets heated to a high temperature due to the
magnetic effect of current
heating effect of current
chemical effect of current
all of these
- 14. Multiple Choice
During electrolysis of water,
hydrogen gas is produced
oxygen gas is produced
water is produced
both (a) and (b)
- 15. Fill in the Blank
LED stands for
- 16. Multiple Choice
To electroplate silver on Copper jewellery, the electrolyte that can be used is:
Copper Sulphate
Silver Nitrate
Ammonium Chloride
Sodium Chloride
- 17. Multiple Choice
Radhika wants to electroplate a plate with ZINC. She has a Zinc bar and the plate. But she does not know which should be the anode and which should be the cathode.
Zinc Bar - Anode, Plate - Cathode
Zinc Bar - Cathode, Plate - Anode
Both Anode and Cathode should be Zinc
- 18. Multiple Choice
Small amount of a mineral salt present naturally in water makes it a______________ of electricity.
insulator
conductor
both a and b
none of these
- 19. Multiple Choice
Flow of electron is called
Electroplating
Electric current
Electrodes
Electrolyte
- 20. Multiple Choice
conductors can allow electricity because of the presence of
free ions
free electrons
free protons
atoms
- Answer choicesTagsAnswer choicesTags