Combustion and Flame Class 8 MCQs Questions with Answers

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

2. Substances which catch fire are called

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

4. Which gas helps in the process of combustion?

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

6. Burning coal in a closed room will produce

7. Acid rain contains mainly

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

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

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

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

12. Which is non-combustible substance?

13. ………… have very low ignition temperature.

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

15. A temperature at which the substance burns is called

16. The burning of LPG is an example of

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

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

19. Calorific value of a fuel is expressed in

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