Define calorific value.

Important Questions on Combustion and Flame

EASY

8th CBSE

IMPORTANT

EUREKA PLUS Revised Bringing Science to Life>Chapter 6 - Combustion and Flame>EXERCISES>Q 5

What is biogas?

EASY

8th CBSE

IMPORTANT

EUREKA PLUS Revised Bringing Science to Life>Chapter 6 - Combustion and Flame>EXERCISES>Q 6

Why is complete combustion less polluting?

EASY

8th CBSE

IMPORTANT

EUREKA PLUS Revised Bringing Science to Life>Chapter 6 - Combustion and Flame>EXERCISES>Q 1

Distinguish between complete and incomplete combustion.

MEDIUM

8th CBSE

IMPORTANT

EUREKA PLUS Revised Bringing Science to Life>Chapter 6 - Combustion and Flame>EXERCISES>Q 2

Draw a candle flame and label its different zones.

MEDIUM

8th CBSE

IMPORTANT

EUREKA PLUS Revised Bringing Science to Life>Chapter 6 - Combustion and Flame>EXERCISES>Q 3

Explain how the wax candle burns?

EASY

8th CBSE

IMPORTANT

EUREKA PLUS Revised Bringing Science to Life>Chapter 6 - Combustion and Flame>EXERCISES>Q 4

List four criteria for an ideal fuel.

MEDIUM

8th CBSE

IMPORTANT

EUREKA PLUS Revised Bringing Science to Life>Chapter 6 - Combustion and Flame>EXERCISES>Q 5

How has the use of CNG in automobiles reduced air pollution?

EASY

8th CBSE

IMPORTANT

EUREKA PLUS Revised Bringing Science to Life>Chapter 6 - Combustion and Flame>EXERCISES>Q 6

Why can't fires caused by liquid fuels be controlled by spraying water?