Question

which statement about evaporation is incorrect
(a) it take place at all temperature
(b) it causes cooling
(c) it occurs only at surface
(d) average kinetic energy of residual liquid molecules
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Answer 1

Answer:

(d)

Explanation:

becauseEvaporation is a type of vaporization which occurs on the surface of the liquid. The evaporation process can occur at a temperature below the boiling point. So by evaporation, only the liquid molecules on the surface get converted to water vapour.

Answer 2

The correct answer to the following question is (d).

• The evaporation takes place at all temperatures, causes cooling, and occurs only at the surface.
• Evaporation is a type of vaporization, which occurs at the surface of the liquid, and it causes a change in a liquid state to a gaseous state, as so it is a surface phenomenon.
• It takes place at all temperatures. At higher temperatures, its speed increases, and so is visible more.
• Evaporation always causes cooling, as it causes heat from the state to get released out. It decreases the temperature of the state, as heat energy is released, and so evaporation is an exothermic reaction.
• It is not equal to the average kinetic energy of residual liquid molecules.