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Heat Capacity

Assertion :Ho...

Question

Assertion :Hot water extinguishes fire more quickly than cold water. Reason: Hot water being at higher temperature is converted to steam in lesser time which by stopping combustion extinguishes the fire.

A

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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B

Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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C

Assertion is correct but Reason is incorrect

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D

Assertion is incorrect but Reason is correct

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Option (A) is correct. Explanation is the correct reason of the statement.
The process of fire extinguishing involves absorption of heat. Absorption of heat in converting hot water to steam is more than heat absorbed in heating cold water to the boiling temperature. Hence, hot water extinguishes fire more quickly than cold water.

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