Combustion and Flame-Flame (CBSE Class-8 Science): Questions 1 - 4 of 4

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Question number: 1

» Combustion and Flame » Flame » Structure of a Flame

MCQ▾

Question

Hottest part of flame is:

Choices

Choice (4) Response

a.

Outermost zone

b.

Zone A

c.

Zone B

d.

Both a. and b. are correct

Question number: 2

» Combustion and Flame » Flame » What Is Flame

MCQ▾

Question

Which types of substances form flame?

Choices

Choice (4) Response

a.

Combustible substance which produces energy when burnt

b.

Combustible gas burns rapidly and produces heat and light

c.

Combustible substances which vaporise during burning form a flame

d.

Combustible substances which have very low ignition temperature and can easily catch fire.

Question number: 3

» Combustion and Flame » Flame » Structure of a Flame

MCQ▾

Question

Part of the candle flame which is least hot and black in colour is:

Choices

Choice (4) Response

a.

Zone C

b.

Innermost region

c.

Zone B

d.

Both a. and b. are correct

Question number: 4

» Combustion and Flame » Flame » Structure of a Flame

MCQ▾

Question

Zone of the candle flame which is yellow in colour is:

Choices

Choice (4) Response

a.

Innermost zone

b.

Zone B

c.

Middle zone

d.

Both b. and c. are correct

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