Answer:
(i)
Physical change Because evaporation of water takes place but no change occurs
in the composition of the substance. (1)
(ii) Physical change It is also involving only movement of air, no change
in the composition of air. (1)
(iii) Physical as well as chemical change First physical change
when kerosene vaporises. After that, burning of kerosene is a chemical change
as new products are formed. (1)
(iv) Physical change As there occurs only the dissolution.
(1)
(v) Physical change As there is no change in composition.
Only the separation of components takes place by the physical phenomenon of centrifugation.
(1)
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