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Question
Why is water not suitable for putting out a petrol fire ?
Options:
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: Option D

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