Chapter 6: Water

Q&A -Ask Doubts and Get Answers

Q
Water

Question:

To clean their spectacles, people often breathe out on glasses to make them wet. Explain why the glasses become wet.

Answer:

We exhale carbon dioxide along with water vapor when we breathe out. This water vapour collides with the surface of spectacles. The surface of spectacles is cold and hence the water vapor condenses on the surface of the spectacles. That is why the glasses become wet


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