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Q.

When chilled water is poured in a tumbler, water droplets appear on the outer body of the tumbler. Which among the following is the probable reason?

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a

Water must have spilled by mistake.

b

The air inside the tumbler forms water droplets on the body of the tumbler due to evaporation.

c

The air around the tumbler cools and condenses on the surface of the tumbler.

d

None of these.

answer is C.

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Detailed Solution

Water droplets appear on the outer body of the tumbler after chilled water is poured in a tumbler because the air around the tumbler cools and condenses on the surface of the tumbler. by the process of condensation. 

When water gets heated, it forms water vapour and rises in the air, this process is called evaporation. 

Thus, the correct answer is option A.

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