Chemical Effects Of Electric Current

1.

Multiple Choice

30 sec

1 pt

During electrolysis of water we get.....

hydrogen and oxygen

negative and positive ions

hydrogen and oxides

anode and cathode

2.

Multiple Choice

45 sec

1 pt

Which part of an atom is responsible for flow of current?

ions

proton

neutron

electron

3.

Multiple Choice

30 sec

1 pt

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

Nickel

Silver

Chromium

Sodium

4.

Multiple Choice

30 sec

1 pt

An electrolyte is

a metal

a liquid that conducts current

a non-metal

none of these

5.

Multiple Choice

45 sec

1 pt

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

1 min

1 pt

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

1 min

1 pt

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

1 min

1 pt

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

30 sec

1 pt

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

30 sec

1 pt

Which one of the following solutions will not conduct electricity?

Lemon juice

Vinegar

Tap water

Vegetable oil

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