Combustion and Flame Class 8 MCQs Questions with Answers

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

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

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

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

5. Which gas helps in the process of combustion?

6. Which is non-combustible substance?

7. Burning coal in a closed room will produce

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

9. The burning of LPG is an example of

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

11. Substances which catch fire are called

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

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

14. Acid rain contains mainly

15. Calorific value of a fuel is expressed in

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

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

18. A temperature at which the substance burns is called

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

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