CBSE (Central Board of Secondary Education- Board Exam) Class-8 Science: Questions 154 - 161 of 469

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Question number: 154

» Coal and Petroleum » Coal » Coke and Coal Tar

MCQ▾

Question

Coke is used in the preparation of:

Choices

Choice (4) Response

a.

Nylon

b.

Acrylic fibres

c.

Rayon

d.

Plastics

Question number: 155

» Combustion and Flame » Fuel » Ideal Fuel

MCQ▾

Question

Examples of fuels used in industries are:

Choices

Choice (4) Response

a.

Water gas

b.

Producer gas

c.

Natural gas

d.

Both a. and b. are correct

Question number: 156

» Combustion and Flame » Types of Combustion » Spontaneous Combustion

MCQ▾

Question

Phosphorescence is an example of:

Choices

Choice (4) Response

a.

Rapid combustion

b.

Explosion

c.

Spontaneous combustion

d.

Question does not provide sufficient data or is vague

Question number: 157

» Coal and Petroleum » Petroleum » Natural Gas

MCQ▾

Question

Natural gas is used as:

Choices

Choice (4) Response

a.

A fuel in homes and in industry

b.

To manufacture carbon

c.

To manufacture hydrogen

d.

All a. , b. and c. are correct

Question number: 158

» Combustion and Flame » Fuel » Burning of Fuels Leads to Harmful Products

MCQ▾

Question

Global warming is produced due to the presence of gas, excess amount of

Choices

Choice (4) Response

a.

SO2 and NO2

b.

Carbon monoxide

c.

Carbon dioxide in air

d.

Question does not provide sufficient data or is vague

Question number: 159

» Coal and Petroleum » Natural Resources » Exhaustible Natural Resources

MCQ▾

Question

Natural resources present in limited quantity in our nature are called as:

Choices

Choice (4) Response

a.

Man-made material

b.

Renewable resources

c.

Inexhaustible natural resources

d.

Exhaustible natural resources

Question number: 160

» Coal and Petroleum » Petroleum » Constituents of Petroleum & Their Uses

MCQ▾

Question

Natural gas is also known as:

Choices

Choice (4) Response

a.

Lubricating gas

b.

Fuel gas

c.

Refinery gas

d.

Petroleum gas

Question number: 161

» Combustion and Flame » Fuel » Introduction to Fuel

MCQ▾

Question

Calorific value of a fuel depends upon:

Choices

Choice (4) Response

a.

Amount of ash and water it contains

b.

Chemical composition

c.

Physical state of the fuel

d.

Both a. and b. are correct

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