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Question

Rohan asked for a glass of water from Sunil. He gave him a glass of cold water. Rohan observed some water droplets on the outer surface of the glass and asked Sunil the reason for this. Which of the below-mentioned will be Sunil's answer?


  1. Evaporation of atmospheric water vapour

  2. Evaporation of water from the glass

  3. Condensation of atmospheric water vapour

  4. Water that seeped out from the glass.


Solution

The correct option is C

Condensation of atmospheric water vapour


Sunil's answer will be that because of the cold water, the outer surface of glass becomes cold and when atmospheric water vapour comes in contact with that then its temperature reduces and condenses to form water droplets on the outer surface of the glass. 

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