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Why do some materials which do nt burn a...

Why do some materials which do nt burn at normal temperature burn at higher temperatures?

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  1. Why do some materials which do nt burn at normal temperature burn at h...

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  2. Name the products formed when a candle burns in the air.

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  3. Give four examples of combustible materials

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  4. Give four examples of non-combustible materials.

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  5. Where do you find spontaneous combustion and rapid combustion in your ...

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  6. Why should not we store spirit or petrol near our living place?

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  7. Can you heat water in a paper vessel? How is it possible?

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  8. Give an example of a good fuel. How do you choose that fuel? Explain.

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  9. List the ways adopted by fire fighters to combat fires.

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  10. The oil fires should not be sprayed with water. Why?

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  11. What precautions are to be taken while pouring water on fire?

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  12. "Is combustion possible without the supply of oxygen? Discuss with you...

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  13. Why a wick is not used in gas burners?

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  14. Collect information available on different fuels. Find out the post pe...

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  15. Collect the information about annual fuel consumption in different par...

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  16. Water is not used to control fires involving electrical equipment.Why?

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  17. It is difficult to burn a heap of green leaves but not a heap of dry l...

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  18. Explain giving reasons: In which of the following situations water wil...

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  19. Explain giving reasons: In which of the following situations water wil...

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  20. Draw the diagram of candle flame and label all the zones.

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  21. Give supporting arguments for both the statements (1) fire is useful (...

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