Multiple Choice Questions on After a hot sunny day people sprinkle water on the roof top because ........ for CAPF (AC) Exam Preparation

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     After a hot sunny day, people sprinkle water on the roof-top because :

     water helps air around the roof-top to absorb the heat instantly

    Incorrect Answer

     water has lower specific heat capacity

    Incorrect Answer

     water is easily available

    Incorrect Answer

     water has large latent heat of vaporisation

    Correct Answer
    Explanation:

     When water at room temperature is sprinkled on a hot surface like rooftop, the heat flow from surface to water molecules takes place, which leads to vaporization of water. This causes a cooling effect.


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