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Q.

Is it true that the kinetic energy of the surface molecules is high due to which they evaporate first hence it is called a surface phenomenon?


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a

True

b

False  

answer is A.

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Detailed Solution

The above statement is true.
The kinetic energy of the surface molecules is high, and as the kinetic energy of a substance molecule increases, the molecule gets evaporated first. Thus it is called a surface phenomenon. Surface phenomena can occur only at the interface between liquid and solid phases. Surface phenomena may be purely physical, or they may be accompanied by chemical transformations.
 
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