Question

name the process associated :

a) an acetone bottle left open and becomes empty.

b) settling of sand ,where a mixture of sand and water is left undisturbed for some time.
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Answer 1

Evaporation
Sedimentation

Answer 2

Explanation:

a) It is because acetone vaporizes at room temperature si when it was left open it vaporizes and mix with air

b) This process is known as sedimentation as Sand does not dissolves completely in water and forms suspension and settle down at bottom.