Question

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Answer 1

Answer:

a.)Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

During evaporation particles of the liquid gain energy from the surroundings to overcome the force of attraction between them.

As a result loss of heat energy occurs in the surroundings that is why evaporation causes cooling .

If we pour some acetone on our hand we will fell cool because the particles gain energy from our hand to evaporate .

Thus evaporation causes cooling

Answer 2

Answer:

A-1

Thus when poured on our palm, acetone will absorb heat from our palms because our body temperature is high and then evaporates rapidly leaving a cooling sensation. Hence when we pour acetone on our palm, it gives us a cooling sensation

A-2

Evaporation is a surface phenomenon because, during evaporation, the molecules with higher kinetic energy dissipate into the air from the topmost layer of the liquid so it is a surface phenomenon