Combustion and Flame Class 8 MCQs Questions with Answers

1. _________ fire extinguisher contains sodium bicarbonate + dil. Sulphuric acid.

2. Which is non-combustible substance?

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

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

5. ………… is better domestic fuel than wood.

6. Which gas helps in the process of combustion?

7. Substances which catch fire are called

8. Goldsmith uses the ………… zone of the flame for melting gold and silver

9. Acid rain contains mainly

10. Out of these, which is able to control fires?

11. ………… have very low ignition temperature.

12. Which is non-renewable source of energy’?

13. Which zone of a flame does a goldsmith use for melting gold and silver ?

14. The burning of LPG is an example of

15. A temperature at which the substance burns is called

16. Which zone represents the partial combustion in candle flame?

17. ……… of fuel forms poisonous carbon monoxide gas.

18. Which of the following is not a fossil fuel?

19. Burning coal in a closed room will produce

20. Calorific value of a fuel is expressed in