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How will you show that air is necessary ...

How will you show that air is necessary for combustion ?

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Oxygen is necessary for combustion as it suppotrs combustion. For example, when a burning candle is covered with an inverted glass jar, the candle flame will go out in a short time due to the absence of oxygen inside the glass jar.
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PEARSON IIT JEE FOUNDATION-COMBUSTION AND FLAME -CLASSROOM CORNER Short Answer Type Questions
  1. Which fuel does not burn with a flame? Comment.

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  2. Does magnesium burn with a flame? Explain in your own words.

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  3. Explain why how flame is formed.

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  4. Define incomplete and complete combustion.

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  5. Why is magnesium so flammable? Justify your answer.

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  6. What colour flame is the coolest in a candle?

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  7. How does water poured on a burning log of wood help extinguish the fir...

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  8. Why LPG is stored in liquid form?

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  9. Why are gas bottles formed in the shape of a cylinder?

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  10. Why is liquid stored in cylinders rather than boxes like other cargo?

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  11. Discuss what happens when LPG leaks.

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  12. Why is blue fire considered the hottest?

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  13. What is the coldest fire color in a candle flame?

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  14. Discuss at what temperature does clothes catch on fire.

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  15. Explain why does a matchstick not burn on its own.

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  16. What are the conditions necessary for combustion to take place ?

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  17. How will you show that air is necessary for combustion ?

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  18. Explain why heat is produced by the sun.

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  19. Why are the flames of candles and oil lamps usually used for lighting ...

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  20. Explain why you are asked to stay close to the ground while escaping a...

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