Question

Name the process associated with the following a.Dry ice is kept at room temperature and at one atmospheric pressure b.A drop of ink placed on the surface of water contained in a glass spreads throughout the water c.A potassium permanganate crystal is in a beaker and water is poured into the beaker with stirring. d.A acetone bottle is left open and the bottle becomes empty. e.Milk is churned to separate cream from it. f.Settling of sand when a mixture of sand and water is left undisturbed for some time g.Fine beam of light entering through a small hole in a dark room ,illuminates the particles in its paths

Answer 1

a]. Sublimation:
When dry ice is kept open at room temperature, it turns into gas.

b] Diffusion:
When drop of ink is placed on the surface of water it spreads over the water and mixes.

c]. Diffusion
KMnO4 Crystals mixes with the particles of the water.

d].Vapourization:
Since acetone vaporizes at room temperature , it is always stored in bottle.

e].Centrifugation: 
Milk is churned to separate from curd by the centrifugation process where the lighter particles will float and denser particles will settle at bottom in centrifuge machine.

f]. Sedimentation:
Sedimentation is process where sand will settle at bottom of water if left undisturbed.

g]. Tyndall effect:When beam of light passes through colloidal particles it illuminates the path.

Answer 2

a. sublimation

b. diffusion

c. diffusion

d. evaporation

e. centrifugation

f. sedimentation

g. tyndall effect