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In a candle flame, what is the colour of...

In a candle flame, what is the colour of : outer zone ?

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LAKHMIR SINGH & MANJIT KAUR-COMBUSTION AND FLAME-EXERCISES
  1. In a candle flame, what is the colour of : innermost zone ?

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  2. In a candle flame, what is the colour of : middle zone ?

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  3. In a candle flame, what is the colour of : outer zone ?

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  4. Name any harmful product released by the burning of fuels.

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  5. Name the very poisonous gas produced by the incomplete combustion of f...

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  6. Name the fuel which is gradually replacing petrol and dissel in automo...

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  7. Name two substances having low ignition temperatures and two having hi...

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  8. Fill in the following blanks with suitable words : A fuel must be he...

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  9. Fill in the following blanks with suitable words : The most common ...

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  10. Fill in the following blanks with suitable words : Fire produced by ...

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  11. Fill in the following blanks with suitable words : A liquis fuel use...

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  12. Fill in the following blank with a suitable word : The amount of he...

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  13. Fill in the following blanks with suitable words : The substances w...

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  14. Fill in the following blanks with suitable words : Burning of wood a...

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  15. What are fuels ?

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  16. Name any two common fuels.

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  17. State any four characteristics of an ideal fuel (or good fuel).

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  18. Define the calorific value of a fuel.

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  19. "The calorific value of LPG is 55000 kj/kg". What does it mean ?

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  20. Can you burn a piece of wood by bringing a lighted matchstick near it ...

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