Combustion and Flame Class 8 MCQs Questions with Answers

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

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

3. The burning of LPG is an example of

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

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

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

7. Which is non-combustible substance?

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

9. Which gas helps in the process of combustion?

10. Calorific value of a fuel is expressed in

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

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

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

14. A temperature at which the substance burns is called

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

16. Substances which catch fire are called

17. Burning coal in a closed room will produce

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

19. ………… have very low ignition temperature.

20. Acid rain contains mainly