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Standard VI
Chemistry
Evaporation
Four students...
Question


Four students (A), (B), (C) and (D) independently observed the evaporation of water under different conditions, and recorded the temperature of water at regular intervals as shown below.
The correct recording of observations is that of the student:
208170_65f10fe1b35a4f988b00b44dab346359.png

A
(A)
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B
(B)
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C
(C)
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D
(D)
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Solution

The correct option is D (B)
Student (B) made the correct recording of observations. The temperature of water is expected to decrease gradually. Actually, molecules of water undergoing evaporation take up energy from the rest of water molecules in the container. As a result, the temperature is expected to decrease.

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