EASY
8th CBSE
IMPORTANT
Earn 100

When a fuel is burnt, carbon dioxide (or carbon monoxide) and water vapour are given out. Can you name one fuel which burns without giving off water vapour? Why does it not give out water?

Important Questions on Combustion and Flame

MEDIUM
8th CBSE
IMPORTANT
Living Science 8>Chapter 6 - Combustion and Flame>EXERCISES>Q 4
 Why does a matchstick burn on rubbing it on the side of the matchbox?
MEDIUM
8th CBSE
IMPORTANT
Living Science 8>Chapter 6 - Combustion and Flame>EXERCISES>Q 5
Your LPG gas stove at home is giving a yellow flame. What can this mean?
MEDIUM
8th CBSE
IMPORTANT
Living Science 8>Chapter 6 - Combustion and Flame>EXERCISES>Q 6
A flame always points upwards. Why do you think this is so?
MEDIUM
8th CBSE
IMPORTANT
Living Science 8>Chapter 6 - Combustion and Flame>EXERCISES>Q 7
When a candle burns, is it possible to get the wax back
  • after the wax melts?
  • after the wax burns?
EASY
8th CBSE
IMPORTANT
Living Science 8>Chapter 6 - Combustion and Flame>EXERCISES>Q 8
Why do we wrap a blanket around a person whose clothes have caught fire?
HARD
8th CBSE
IMPORTANT
Living Science 8>Chapter 6 - Combustion and Flame>EXERCISES>Q 9
Why do forest fires occur during hot summers?
MEDIUM
8th CBSE
IMPORTANT
Living Science 8>Chapter 6 - Combustion and Flame>EXERCISES>Q 10
Why is it easier to burn dry leaves but not green leaves?
MEDIUM
8th CBSE
IMPORTANT
Living Science 8>Chapter 6 - Combustion and Flame>VALUES
Namita noticed that the LPG gas stove in her kitchen was giving out yellow flame and blackening the utensils. She cleaned the stove burners. The flame then became blue and stopped blackening the utensils. She explained to her parents that the stove was not burning efficiently and wasting fuel because it was dirty. What values did Namita show?