Question

what determine state of a substance? suggest a method to liquefy gases . water droplets are obserevedon outer surface of a glass tumbler containing ice cold water . give reason.

Answer 1

water vapour can be condensed

Answer 2

Here is your answer

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This is due to the reason that the water vapours present in Air , on coming in contact with the cold surface of the glass, lose energy and get condensed or get converted into the liquid state , which we see as water droplets .

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Hope this helps you.....