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