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Why do we keep phosphorus in water?...

Why do we keep phosphorus in water?

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VGS PUBLICATION-BRILLIANT-COMBUSTION , FUELS AND FLAME-EXERCISE
  1. It is difficult to burn a heap of green leaves but not a heap of dry l...

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

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  3. Why do we keep phosphorus in water?

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  4. How do you feel about "Fuels have become a part of human life"?

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  5. Is there any other procedure to prove that oxygen is needed for burnin...

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  6. The gas needed for combustion among the following is

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  7. The lowest temperature at which a substance catches fire is called its

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  8. The unit of calorific value

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  9. Spirit and petroleum turns into gas at

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  10. The type of combustion in which material suddenly burns into flames wi...

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  11. Why does candle give flame when it is burnt but why does coal burn wit...

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  12. Do all fuels produce same amount of heat when they are burnt?

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  13. What do we need to burn a material?

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  14. Have you observed material used to make school bell or bells in temple...

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  15. Name the three meninges. In which group of animals do you find all of ...

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  16. What do we need to burn a material?

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  17. Can we burn a material in the absence of air?

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  18. Why does a scented stick with burning stub does not catch fire when it...

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  19. Why does a scented stick with burning stub does not catch fire when it...

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

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