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What is the reason behind blue and yellow coloured flames in combustion process?

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NCERT TELUGU-COMBUSTION: FUELS AND FLAME-EXERCISE
  1. What factors do you keep in mind to put out fire when it is spreading ...

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

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

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

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

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  6. Which fuel has highest calorific value

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  7. Which zone of the flame is brightest

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  8. Removal of papers from heap is

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

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

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

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

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  13. Fill in the Blanks:Goldsmiths use ……………… zone of flame for making orna...

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  14. Fill in the Blanks:Oil fires cannot be controlled by………………….

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  15. Fill in the Blanks:The amount of heat produced by burning I kg fuel is...

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  16. Fill in the Blanks:Burning of cow dung cakes cause…………………

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  17. Fill in the Blanks:Vehicles emit…………..gases.

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

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  19. FILL IN THE BLANKS : When coal is heated in the absence of air we get ...

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  20. Fill in the blanks. ……was used in manufacture of steel.

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