EASY
8th CBSE
IMPORTANT
Earn 100

Complete combustion takes place in the absence of air.

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Important Questions on Combustion and Flame

EASY
8th CBSE
IMPORTANT
Focus Science in Everyday Life>Chapter 6 - Combustion and Flame>Exercise>Q 2
Partial combustion of wax vapours takes place in the middle zone of a candle flame.
EASY
8th CBSE
IMPORTANT
Focus Science in Everyday Life>Chapter 6 - Combustion and Flame>Exercise>Q 3
Primary fuels are obtained by different chemical processes.
EASY
8th CBSE
IMPORTANT
Focus Science in Everyday Life>Chapter 6 - Combustion and Flame>Exercise>Q 4
The efficiency of a fuel is judged by its calorific value.
EASY
8th CBSE
IMPORTANT
Focus Science in Everyday Life>Chapter 6 - Combustion and Flame>Exercise>Q 5
There is no fuel that has all the characteristics of an ideal fuel.
EASY
8th CBSE
IMPORTANT
Focus Science in Everyday Life>Chapter 6 - Combustion and Flame>Exercise>Q 1

Write one word for the following:

The process of burning a substance in the presence of air or oxygen.

MEDIUM
8th CBSE
IMPORTANT
Focus Science in Everyday Life>Chapter 6 - Combustion and Flame>Exercise>Q 2

Write one word for the following:

The region of flame where complete combustion of fuel takes place

EASY
8th CBSE
IMPORTANT
Focus Science in Everyday Life>Chapter 6 - Combustion and Flame>Exercise>Q 3

Write one word for the following:

Substances that produce heat and light energy on burning

EASY
8th CBSE
IMPORTANT
Focus Science in Everyday Life>Chapter 6 - Combustion and Flame>Exercise>Q 4

Write one word for the following:

A combustion in which a large amount of gas is liberated