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

Quiz Instructions

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1. Magnesium burns with white dazzling light. Charcol burns producing heat and light.
2. CNG & LPG are examples of
3. Which one of the following is an inflammable substance:
4. Why should you not add water on burning oil?
5. On a cold winter night, the persons sleeping in a room with closed door and windows with a coal fire burning inside may die due to excessive accumulation of:
6. In the following what is the status of the need to occur in combustion?
7. When a magnesium ribbon is burnt, it produces
8. Which of the following statements is incorrect about carbon dioxide acting as a fire extinguisher for electrical fires?
9. Which of the following does not produce flame while burning
10. The substance that undergoes combustion is said to be
11. A blue flame indicates ..... combustion.
12. Bunsen burner is an example of a/an ..... burner.
13. What is called 'black gold'?
14. The lowest temperature at which a substance catches fire is called its .....
15. The substance which ..... during burning give flames,
16. In what type of matter can a fuel exist
17. Which of the following chemical reactions involve combustion?
18. Is the combustion reversable
19. Unburnt carbon particles causes
20. Ignition temperature of a fuel in air is ..... that in pure oxygen.
21. Acid rain is caused by oxides of
22. The suspended particles released by combustion of coal in air may lead to a health disease. selcet the correct option
23. The gas which contributes maximum to the heating value of natural gas is
24. Fire is extinguished by
25. The zone of the candle flame which is moderately hot is called,
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