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- 1. Multiple Choice
During electrolysis of water we get.....
hydrogen and oxygen
negative and positive ions
hydrogen and oxides
anode and cathode
- 2. Multiple Choice
Which part of an atom is responsible for flow of current?
ions
proton
neutron
electron
- 3. Multiple Choice
Which of the following is not used for electroplating metal articles?
Nickel
Silver
Chromium
Sodium
- 4. Multiple Choice
An electrolyte is
a metal
a liquid that conducts current
a non-metal
none of these
- 5. Multiple Choice
In the figure given,Which of these two circuits shows the correct observation.
A
B
Both A and B
None of the above
- 6. Multiple Choice
An experiment was conducted to test the conductivity of two solutions A and B.The bulb glows in circuit A but not in B.What does this experiment say about the nature of the solution?
Solution A is a good conductor.
Solution B does not have charged ions.
Impurities can be added to solution B to make it a better conductor.
All the above.
- 7. Multiple Choice
The diagram shows the purification of copper. What are the correct labels for this experiment?
A: Pure copper electrode
B: Copper sulfate electrolyte
C: Graphite electrode
A: Impure copper electrode
B: Copper sulfate electrolyte
C: Graphite electrode
A pure copper electrode,
B copper sulfate electrolyte
C impure copper electrode.
A: Pure copper electrodeB: Sulphuric acid electrolyteC: Impure copper electrode
- 8. Multiple Choice
What are the three chemical effects of current?
1.Gas Bubbles may be formed at electrodes
2. Metals may get deposited on electrodes
3. Change of colour of the solution.
1.Heat produced at electrodes.
2.Metals deposited on cathode.
3.Evolution of smell.
1.Gas Bubbles may be formed on cathode.
2. Metals may get deposited on electrolyte.
3. Change of colour of the solution.
None of the above.
- 9. Multiple Choice
Why is LED preferred to other type of bulbs?
It is cheap.
It works efficiently.
it can glow even when weak or less current flows through it.
it can glow even when high or more current flows through it.
- 10. Multiple Choice
Which one of the following solutions will not conduct electricity?
Lemon juice
Vinegar
Tap water
Vegetable oil
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