Make a list of inflammable substances.

Important Questions on Combustion, Fuels and Flame

MEDIUM

8th Andhra Pradesh Board

IMPORTANT

Physical Science Class 8>Chapter 8 - Combustion, Fuels and Flame>Exercise 12>Q ●

If two paper cups are placed on the burner one with the water and another is without water (empty cup) which will burn first?

MEDIUM

8th Andhra Pradesh Board

IMPORTANT

Physical Science Class 8>Chapter 8 - Combustion, Fuels and Flame>Exercise 12>Q ●

If we can put a paper cup with water in it on the burner, will water in the cup become hot? Why?

HARD

8th Andhra Pradesh Board

IMPORTANT

Physical Science Class 8>Chapter 8 - Combustion, Fuels and Flame>Exercise 12>Q ●

When we keep the paper glass with the water on the burner will it burn? When?

HARD

8th Andhra Pradesh Board

IMPORTANT

Physical Science Class 8>Chapter 8 - Combustion, Fuels and Flame>Exercise 12>Q ●

What makes matchstick to catch fire?

MEDIUM

8th Andhra Pradesh Board

IMPORTANT

Physical Science Class 8>Chapter 8 - Combustion, Fuels and Flame>Think and discuss>Q ●

Why is phosphorus preserved in the water? (Hint: Think about the role of ignition temperature in combustion)

MEDIUM

8th Andhra Pradesh Board

IMPORTANT

Physical Science Class 8>Chapter 8 - Combustion, Fuels and Flame>Think and discuss>Q ●

Why kerosene stoves and Bunsen burners have small holes in them? (Hint: Think about the role of air in combustion)

MEDIUM

8th Andhra Pradesh Board

IMPORTANT

Physical Science Class 8>Chapter 8 - Combustion, Fuels and Flame>Think and discuss>Q ●

It is hard to ignite matchstick on rainy days? Why?

MEDIUM

8th Andhra Pradesh Board

IMPORTANT

Physical Science Class 8>Chapter 8 - Combustion, Fuels and Flame>Exercise 14>Q ●

Wood, LPG, petrol, diesel, CNG, kerosene, hydrogen these are examples of fuel. Can you decide the best fuel amongst them?