Question

chemistry and physics
short answer
answer​

Answer 1

Answer:

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Explanation:

1:On a hot, humid day, due to the heat our body starts sweating for the cooling mechanism i.e., by evaporation and gets cooling effect. But the air cannot hold any more water on a humid day and therefore the sweat or perspiration is seen.

2:Reason: Due to the sun's heat, the kinetic energy of particles in the balloons increases and it expands. It continues to expand and comes to a stage when the balloon bursts.

3:Liquids changes into vapour by the process of evaporation. The factors that affect the rate of evaporation of liquids are temperature, surface area, wind speed, and humidity.

4:The main characteristic properties of colloidal solutions are as follows.

(i) Heterogeneous nature: Colloidal sols are heterogeneousin nature. ...

(ii) Stable nature: The colloidal solutions are quite stable. ...

(iii) Filterability: Colloidal particles are readily passed through the ordinary filter papers.

5:Crystallisation is a process that separates a pure solid in the form of its crystals from a solution. Crystallisation is better than evaporation because during Evaporation. ... Some impurities may remain dissolved in the solution even after filtration which on evaporation contaminates the solid.