CBSE (Central Board of Secondary Education- Board Exam) Class-8 Science: Questions 134 - 141 of 469

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Question number: 134

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

MCQ▾

Question

Harmful gases released during combustion are:

Choices

Choice (4) Response

a.

Water gas

b.

Carbon monoxide, carbon dioxide

c.

Hydrogen, nitrogen,

d.

Producer gas

Question number: 135

» Coal and Petroleum » Natural Resources » Inexhaustible Natural Resources

MCQ▾

Question

Natural resources which contain both living and non-living resources are:

Choices

Choice (4) Response

a.

Inexhaustible natural resources

b.

Exhaustible natural resources

c.

Fossil fuels

d.

Natural gas

Question number: 136

» Combustion and Flame » Fuel » Introduction to Fuel

MCQ▾

Question

Substances used for producing heat energy are called as:

Choices

Choice (4) Response

a.

Fire

b.

Flame

c.

Combustion

d.

Fuel

Question number: 137

» Combustion and Flame » Types of Combustion » Rapid Combustion

MCQ▾

Question

Combustion occurs rapidly is called as:

Choices

Choice (4) Response

a.

Spontaneous combustion

b.

Rapid combustion

c.

Explosion

d.

None of the above

Question number: 138

» Combustion and Flame » Combustion » Combustible Substances

MCQ▾

Question

Combustible substance:

Choices

Choice (4) Response

a.

It may be in the form of solid, liquid or gas

b.

Is the fuel which undergoes combustion

c.

Both a. and b. are correct

d.

Question does not provide sufficient data or is vague

Question number: 139

» Combustion and Flame » Fuel » Introduction to Fuel

MCQ▾

Question

Synthetic petroleum is prepared from:

Choices

Choice (4) Response

a.

Powered animal dung

b.

Coal gas

c.

Powered coal

d.

Powered coke

Question number: 140

» Coal and Petroleum » Exhaustible Natural Resources » Some Natural Resources Are Limited

MCQ▾

Question

Some limited natural resources are:

Choices

Choice (4) Response

a.

Water, Air, Soil

b.

Petroleum, Natural gas

c.

Minerals, Trees

d.

All a. , b. and c. are correct

Question number: 141

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

MCQ▾

Question

Household fuel is also known as:

Choices

Choice (4) Response

a.

CNG

b.

Kerosene oil

c.

LPG

d.

Both b. and c. are correct

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