CBSE (Central Board of Secondary Education- Board Exam) Class-8 Science: Questions 175 - 180 of 469

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 469 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 300.00 or

Question number: 175

» Coal and Petroleum » Natural Resources » Exhaustible Natural Resources

MCQ▾

Question

Non-renewable resources include:

Choices

Choice (4) Response

a.

Only living resources

b.

Only non-living resources

c.

Synthetic fibres

d.

Living and non-living resources

Question number: 176

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

MCQ▾

Question

Petrol or gasoline is used as a fuel in:

Choices

Choice (4) Response

a.

light vehicles

AND

Cars

b.

Scooters

c.

Motor cycles

d.

All a. , b. and c. are correct

Question number: 177

» Combustion and Flame » Fire » How Do We Control Fire?

MCQ▾

Question

Fire can be controlled by:

Choices

Choice (4) Response

a.

Presence of combustible substance

b.

If any of the condition require for combustion are not met then fire can be extinguished

c.

Presence of supporter of combustion (oxygen of air)

d.

Attainment of proper ignition temperature

Question number: 178

» Combustion and Flame » Combustion » Ignition Temperature

MCQ▾

Question

Ignition temperature is defined as:

Choices

Choice (4) Response

a.

The amount of heat energy produced on complete combustion of 1 Kg of a fuel

b.

A substance which produce energy when burnt in presence of oxygen

c.

Lowest temperature at which substance catches fire

d.

None of the above

Question number: 179

» Coal and Petroleum » Coal » Coke and Coal Tar

MCQ▾

Question

Solid residue formed after the destructive distillation of coal is called:

Choices

Choice (4) Response

a.

Crude oil

b.

Petroleum

c.

Coke

d.

Coal-tar

Question number: 180

» Coal and Petroleum » Petroleum » Refining of Petroleum

MCQ▾

Question

Process of separating crude petroleum into more useful components is called as

Choices

Choice (4) Response

a.

Carbonisation

b.

Decomposition

c.

Fractional distillation

d.

Refining

f Page
Sign In