Complete the sentence by selecting the correct alternative:
Water is not a suitable fire extinguisher to douse fires involving oil and petrol because ______________

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water may conduct electricity

water is heavier than oil

water cannot be stored at high pressure in the cylinders

water is lighter than air

answer is B.

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Detailed Solution

Solution:

Water is not a suitable fire extinguisher to douse fires involving oil and petrol because water is heavier than oil.

Water is heavier than oil; hence, it sinks below the oil, allowing the fire to keep burning. Fire from oil and petroleum is extinguished using sand or CO₂ fire extinguishers.

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