Combustion and Flame-Combustion (CBSE (Central Board of Secondary Education- Board Exam) Class-8 Science): Questions 1 - 4 of 4

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Question number: 1

» Combustion and Flame » Combustion » Inflammable Substances

MCQ▾

Question

The substances with low ignition temperature are called as:

Choices

Choice (4) Response

a.

Flammable substance

b.

Fuel

c.

Inflammable substance

d.

All of the above

Question number: 2

» 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: 3

» Combustion and Flame » Combustion » Process of Combustion

MCQ▾

Question

Combustion is defined as:

Choices

Choice (4) Response

a.

Amount of heat energy produced on complete combustion of 1kg of a fuel

b.

Substance which produces energy

c.

Substance which vapourise during burning form a flame

d.

Chemical process in which a substance react with oxygen to give off heat

Question number: 4

» 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

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