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When an object catches fire, the fire is...

When an object catches fire, the fire is put off by covering with sand or a blanket?Why?

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NCERT TELUGU-COMBUSTION: FUELS AND FLAME-EXERCISE
  1. A slow fire bursts into a flame when air is blown on it, but a candle ...

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  2. If a large quantity of dry grass is set on fire in forests then it is ...

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  3. When an object catches fire, the fire is put off by covering with sand...

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  4. In a Wax candle flame, how many flame zones do you observe ? Which is ...

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  5. How many types of combustion is there ? What are they?

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  6. Distinguish between combustible materials and non-combustible material...

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  7. Why is water not suitable to put out fires of oil and petrol ?

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  8. How does water help in eliminating the factors, which support the comb...

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  9. What factors do you keep in mind to put out fire when it is spreading ...

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  10. What are the advantages of using carbon dioxide instead of water to ex...

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  11. What is the reason behind blue and yellow coloured flames in combustio...

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  12. Write an activity to prove that oxygen helps in burning.

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  13. Name the fuel that is commonly used by most of the people

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  14. Which fuel has highest calorific value

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  15. Which zone of the flame is brightest

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  16. Removal of papers from heap is

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  17. Which one of the following is eco-friendly fuel

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  18. Fill in the Blanks:…………….is a combustible substance.

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  19. Fill in the Blanks:…………….fuels have more calorific value.

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  20. Fill in the Blanks:………………is necessary for combustion.

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