State one similarity and one difference between evaporation and boiling.
Q. (a) State one similarity and one difference between evaporation and boiling.
(b) Account for the following:
(i) We wear cotton clothes in summer.
(ii) A wet handkerchief is placed on the forehead of a person suffering from high fever.
(iii) Wet clothes dry slowly during rainy season.
Ans. (a) Similarity: In both cases liquid gets converted into vapours.
Difference: Evaporation is a surface phenomenon while boiling is a bulk phenomenon.
(b) (i) Cotton clothes absorb perspiration which causes cooling.
(ii) Evaporation causes cooling.
(iii) Rate of evaporation is less during rainy season.
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