Question

Question 3:
Water can not be used to extinguish a fire in a petrol pump. Why?
A. Water will convert to steam which can cause burns.
B. Petrol floats on water and continues to burn.
C. A large quantity of water will be needed which is not easily available
near petrol pumps.
D. Water aggravates the fire in this case.​

Answer 1

Answer:

B is the right answer

Explanation:

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Answer 2

Answer:

Petrol floats on water and continues to burn is the correct answer.

Explanation:

• Due to the fact that water is heavier than petrol, it slides down, allowing the petroleum to rise to the surface and continue to burn.
• In addition, the temperature is so great that water applied to the fire evaporates even before it has a chance to do so. If only a small amount of water is poured, the latter is true.
• The supply of the fundamental three elements oxygen, fuel, and heat cannot be stopped when we apply water to a gasoline fire.
• Petrol will rise above the sea because it weighs more than water, continuing its contact with the atmosphere (oxygen).
• Since the fire has already raised the temperature of the air, most of the water sprayed will evaporate more quickly.
• Water therefore cannot put out a petrol fire.

The volume occupied by 1 molecule of H2O is 2.99×1023 ml.

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