Combustion and Flame Class 8 MCQs Questions with Answers

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

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

3. Which gas helps in the process of combustion?

4. Burning coal in a closed room will produce

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

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

7. A temperature at which the substance burns is called

8. ………… have very low ignition temperature.

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

10. The burning of LPG is an example of

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

12. Which is non-combustible substance?

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

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

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

16. Calorific value of a fuel is expressed in

17. Substances which catch fire are called

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

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

20. Acid rain contains mainly