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Fire extinguishers extinguish the fire b...

Fire extinguishers extinguish the fire by

A

cutting off the supply of air

B

bringing down the temperature of fuel

C

supplying air to the fuel

D

both (a) and (b).

Text Solution

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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. Which of the following is fuel for our body?

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  2. Which of the following has lower ignition temperature?

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  3. Fire extinguishers extinguish the fire by

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  4. Unburnt carbon particles of the fuel cause

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

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

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

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  8. The hottest part of the Bunsen burner is

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

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

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  11. The formation of soot occurs when

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

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

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

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

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  16. What does this experiment show?

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  17. Which of the following is highly inflammable?

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

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

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  20. Which statement best explains the spontaneous combustion?

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