Chemical Effects of Electric Current (CBSE (Central Board of Secondary Education- Board Exam) Class-8 Science): Questions 1 - 8 of 12

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Question number: 1

» Chemical Effects of Electric Current » Do Liquids Conducts Electricity? » Good Conductor and Poor Conductor of Electricity

True-False▾

Following Statement is true or false:

Does distilled water conduct?

Question number: 2

» Chemical Effects of Electric Current » Do Liquids Conducts Electricity? » LED

MCQ▾

Question

LED is defined as:

Choices

Choice (4) Response

a.

Light emitting diode

b.

Electrode

c.

Lead

d.

Insulator

Question number: 3

» Chemical Effects of Electric Current » Electroplating » Circuit for Electroplating

MCQ▾

Question

Chromium plating is found on:

Choices

Choice (4) Response

a.

Car bumpers bicycle handlebars

b.

Bath tapes

c.

Towel rails

d.

All a. , b. and c. are correct

Question number: 4

» Chemical Effects of Electric Current » Electroplating » Process of Electroplating

MCQ▾

Question

Deposition of a metal over another metallic object is called as:

Choices

Choice (4) Response

a.

Electrolysis

b.

Electroplating

c.

Electrodes

d.

All of the above

Question number: 5

» Chemical Effects of Electric Current » Chemical Effects of Electric Current » Electrodes

MCQ▾

Question

Terminals through which electric current passed are called as:

Choices

Choice (4) Response

a.

Insulators

b.

Electrode

c.

Conductors

d.

LED

Question number: 6

» Chemical Effects of Electric Current » Electroplating » Circuit for Electroplating

MCQ▾

Question

Why tin cans are used for storing food items:

Choices

Choice (4) Response

a.

Because tin is less reactive as compared to iron

b.

Because tin is more reactive as compared to iron

c.

It is a good conductor

d.

It is a good insulator

Question number: 7

» Chemical Effects of Electric Current » Do Liquids Conducts Electricity? » Concept of Electric Current

MCQ▾

Question

Substances which allow the current to pass through them are:

Choices

Choice (4) Response

a.

Semi-Conductors

b.

Conductors

c.

Insulators

d.

None of the above

Question number: 8

» Chemical Effects of Electric Current » Chemical Effects of Electric Current » Concept to Chemical Effects of Electric Current

MCQ▾

Question

The passage of an electric current through a liquid causes chemical changes is called as:

Choices

Choice (4) Response

a.

Electrode

b.

Electrolysis

c.

Electroplating

d.

Question does not provide sufficient data or is vague

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