CBSE  /  Class 8  /  Science  /  Combustion and Flame

  • 1. 
    Which one of the following gases is used in combustion?

  • Hydrogen
  • Oxygen
  • Nitrogen
  • Carbon dioxide

  • 2. 
    The burning of LPG is an example of

  • rapid combustion
  • spontaneous combustion
  • slow combustion
  • explosion

  • 3. 
    A temperature at which the substance burns is called

  • melting
  • boiling temperature
  • kindling temperature
  • evaporation

  • 4. 
    Which is non-renewable source of energy'?

  • Natural gas
  • Wind energy
  • Tidal energy
  • Mechanical energy

  • 5. 
    Which of the following is not a fossil fuel?

  • Coal
  • Petroleum
  • Natural gas
  • Water gas

  • 6. 
    Which gas helps in the process of combustion?

  • Cooking gas
  • Nitrogen gas
  • Oxygen gas
  • Producer gas

  • 7. 
    The amount of heat energy produced on complete combustion of 1 kg of a fuel is called

  • calorific value
  • significant value
  • heat value
  • internal energy

  • 8. 
    Which zone represents the partial combustion in candle flame?

  • Outer zone
  • Middle zone
  • Inner zone
  • Lower zone

  • 9. 
    Burning coal in a closed room will produce

  • nitrogen oxides
  • carbon dioxide
  • carbon monoxide
  • oxygen

  • 10. 
    Substances which catch fire are called

  • acids
  • bases
  • combustible
  • burners
Report Question
warning
Practice More On Combustion and Flame
Quiz 1 Quiz 2 Quiz 3
access_time
  Time