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What chemicals are present in the substa...

What chemicals are present in the substances applied on the head of a match stick.

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NCERT TELUGU-COMBUSTION: FUELS AND FLAME-EXERCISE
  1. “Sneha wanted to know why paraffin wax in a candle and the wick in a d...

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  2. Give two examples of fossil fuels.

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  3. What chemicals are present in the substances applied on the head of a ...

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  4. Where do you find the red phosphorous on the sides of match box or on ...

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

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

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

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

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

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  10. A slow fire bursts into a flame when air is blown on it, but a candle ...

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

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

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

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

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

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

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

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

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

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

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