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Class 8 Science Chapter 6 Combustion And Flame Quiz 9 (25 MCQs)

Quiz Instructions

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1. Respiration is a reaction which can be called
2. Fuel efficiency is expressed in terms of its calorific value of kJ/kg
3. NAME THE HOTTEST PART OF FLAME
4. Incomplete combustion of a fuel gives poisonous carbon monoxide.
5. Cleaner fuel is
6. The colour of the outer zone of a candle flame is
7. In the sun, light and heat are produced by
8. Water cannot be used as a fire extinguisher to put out
9. Which type of combustion is responsible for the gas burning and producing heat and light.
10. Which of the following fuel has highest calorific value?
11. Name the type of combustion in which a material suddenly bursts into flames without the application of any apparent cause.
12. A sooty flame can be made non-luminous by
13. CNG is
14. In which form the colfloric value represent?
15. CO$_{2}$ is stored as a liquid in cylinder at
16. In a fire triangle, what are the three essential components needed for combustion?
17. What is the most common fire extinguisher
18. Why does a piece of paper burn with yellow flame?
19. Does magnesium produce heat and light during its combustion?
20. What do not produce flames but generate heat
21. The black residue left behind during incomplete combustion is
22. A fuel is:
23. What is the calorific value of a fuel?
24. Coal burns to produce
25. Wood is a better fuel than LPG.
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