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Class 8 Science Chapter 6 Combustion And Flame Quiz 1 (25 MCQs)

Quiz Instructions

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1. Inflammable substances have very low calorific value.
2. What are the conditions for combution
3. A chemical process in which a substance reacts with oxygen to give heat is called explosion.
4. Which of the following is the hottest zone of the flame?
5. Burning of charcoal in a closed room will produce
6. Which chemical is used in the rubbing surface provided for matchsticks?
7. Which one of the following is fuel of out body?
8. Nitrogen in coal
9. LPG burns with a
10. There are following zones of flame
11. Which gas helps in the process of combustion?
12. Which zone of a flame does a goldsmith use for melting gold and silver?
13. The substance which give heat and light after combustion are called
14. How many types of combustion is there
15. Which of the following fuels is used for running automobiles?
16. During combustion of a material, generally:
17. In the presence of water, ignition Temperature of paper is-
18. The product of combustion are
19. Water is not used to control fires involving electrical appliances.
20. Combustion due to external heating which produces both heat and light
21. Burning of charcoal in room will produce
22. Substances which catch fire are called
23. ..... is a cleaner fuel and is being replaced by petrol and diesel.
24. What is the type of combustion which occurs rapidly and produce heat and light?
25. What is the difference between complete and incomplete combustion?
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