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Why do fire brigades pour water on the f...

Why do fire brigades pour water on the fire?

A

Water cools the combustible material so that its temperature is brought below its ignition temperature.

B

This prevents the fire from spreading.

C

Water vapours help in cutting off the supply of air.

D

All of the above.

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The correct Answer is:
D
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MTG IIT JEE FOUNDATION-COMBUSTION AND FLAME -EXERCISE (MULTIPLE CHOICE QUESTIONS) LEVEL 1
  1. Unburnt carbon particles of the fuel cause

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  2. Why do we use paper or kerosene oil to start fire in wood or coal?

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  3. Why do fire brigades pour water on the fire?

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  4. Hydrogen satisfies the conditions of an ideal fuel but cannot be used ...

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  5. The hottest part of the Bunsen burner is

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  6. Read the following statements. 1. Water is the best extinguisher fo...

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  7. Flames of the mixture .......... are used for welding.

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  8. The formation of soot occurs when

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  9. The necessary conditions for combustion process to occur are 1. ava...

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  10. When you introduce a glass plate into the luminous zone of a candle fl...

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  11. Which of the following diagrams shows a non-luminous flame?

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  12. Students were carrying out an experiment in the laboratory, in which o...

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  13. What does this experiment show?

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  14. Which of the following is highly inflammable?

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  15. A spoon was kept in contact with ice cubes for some time. Later, the s...

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  16. When the matchstick strikes against the rubbing surface, what happens ...

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  17. Which statement best explains the spontaneous combustion?

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  18. State which of the following statements is false.

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  19. Identify the correct statements. (i) Carbon dioxide is used to exti...

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  20. Which of the following statements is/are correct? I. The flame of a ...

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