Testing Electrical Conductivity of Liquids

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What is a conductor in terms of electricity?

A material with tightly packed electrons

A material that partially allows electricity to flow through it

A material that prevents the flow of electricity through it

A material that allows electricity to flow through it (correct)

Why do electrons in conductors flow freely?

Because they are delocalized (correct)

Because they are poor conductors

Because they are tightly packed

Because they are insulators

What allows some materials to be classified as poor conductors?

Complete flow of electricity

Tightly packed electrons

Delocalized electrons

Partial flow of electricity (correct)

Why are insulators unable to conduct electricity effectively?

Because they have tightly packed electrons Signup and view all the answers

In what situations can air behave as a conductor of electricity?

During thunderstorms and lightning Signup and view all the answers

Based on the text, why are some materials always classified as good and poor conductors rather than just conductors and insulators?

Because every material may conduct electricity in certain situations Signup and view all the answers

What is the purpose of using LED bulbs in testing the electrical conductivity of liquids?

To detect even small amounts of electric current Signup and view all the answers

Why would a filament not light up in a liquid that conducts electricity weakly?

Because the current passing through is not strong enough Signup and view all the answers

What device can be used instead of LEDs to test electrical conductivity?

Galvanometer Signup and view all the answers

What is the process called when components of a compound split due to passing an electric current?

Electrolysis Signup and view all the answers

What is an electrolyte in the context of electricity?

A solution that breaks into ions under electricity Signup and view all the answers

Which electrode is positively charged in an electrolytic cell?

Anode Signup and view all the answers

What is the purpose of electroplating?

To deposit a layer of metal on another material Signup and view all the answers

Why is distilled water considered a poor conductor of electricity?

It does not contain any salts or minerals to conduct electricity. Signup and view all the answers

Why is it important to choose the right electrodes and electrolytes for electroplating?

To ensure the metal deposits correctly on the material Signup and view all the answers

Which type of liquid is most likely to be a good conductor of electricity?

Salt water Signup and view all the answers

Which of the following metals is NOT commonly used for electroplating?

Iron Signup and view all the answers

What type of material should one of the electrodes be made of in electroplating?

Same as the metal in the electrolyte solution Signup and view all the answers

Why are LED bulbs more suitable for testing electrical conductivity of liquids?

They are resistant to heating effects caused by the electric current. Signup and view all the answers

Why is it necessary to ensure that the electrode chosen for electroplating is completely clean?

To facilitate better adhesion of the deposited metal Signup and view all the answers

What happens when different substances are mixed in water and electricity is passed through them?

The substances form positive and negative ions in the water. Signup and view all the answers

What happens if the wrong electrolyte is chosen for electroplating?

The metal may not deposit correctly Signup and view all the answers

Why do solutions of acids or bases conduct electricity?

They form ions in the solution. Signup and view all the answers

Why are sugar water, oil, and alcohol considered poor conductors of electricity?

They do not form any ions when mixed with water. Signup and view all the answers

What does the observation that current does not flow in the circuit if there is a gap between the two wires indicate?

Air is a poor conductor of electricity Signup and view all the answers

If Boojho passes an electric current through water without adding lemon juice, what difference would it make to his observations?

It would not make any difference Signup and view all the answers

What does the deflection in the magnetic compass indicate in the circuit shown in Fig. 14.11 B?

Presence of an electric current Signup and view all the answers

Why did the bulb not glow in the circuit shown in Fig. 14.11 A?

There was no electric current flowing Signup and view all the answers

What effect would an increase in the number of turns in the coil wound around the magnetic compass have in Fig. 14.11 B?

Further increase in deflection of the magnetic compass Signup and view all the answers

What will be observed if the number of cells are increased in the circuit shown in Fig. 14.11 B?

Increase in brightness of the bulb Signup and view all the answers