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This question belongs to General Knowledge Chemistry

Chemistry

?

Why is water not suitable for putting out a petrol fire ?

A) The oxygen content of water is isolated by petrol and thus it helps in burning B) Petrol is too inflammable to be extinguished by water C) The heat required for combustion of petrol is very low D) Water, being heavy, slips below petrol which thus remains in contact with air and burns

Answer & Solution

Correct Answer: Option D

Water being heavier than petrol slips down permitting the petrol to rise to the surface and continue to burn. Also, the existing temperature is so high that most of the water poured on the fire evaporates even before it can extinguish the fire.

Question posted by Examveda

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