NCERT Class 8 Science-Combustion and Flame[Combustion] [NCERT Based General Studies (GS)]: Questions 1 - 4 of 4

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Question 1

Question MCQ▾

The substances with low ignition temperature are called as:

Choices

Choice (4)Response

a.

Inflammable substance

b.

Fuel

c.

Flammable substance

d.

None of the above

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Question 2

Question MCQ▾

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

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Question 3

Question MCQ▾

Combustion is defined as:

Choices

Choice (4)Response

a.

Substance which vapourise during burning form a flame

b.

Substance which produces energy

c.

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

d.

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

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Question 4

Question MCQ▾

Ignition temperature is defined as:

Choices

Choice (4)Response

a.

A substance which produce energy when burnt in presence of oxygen

b.

Lowest temperature at which substance catches fire

c.

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

d.

All of the above

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