question_answer

(i) Arrange the following substances in increasing order of force of attraction between the particles. (a) water             (b) hydrogen     (c) sand (ii) Why does the temperature remain constant at the melting point? (iii) Which property of gases makes it possible to fill large volume of gases in small cylinders?

Answer:

                                   (i) Hydrogen < Water < Sand                       (ii) This is because heat equal to latent heat of fusion is used to overcome inter particle force of attraction.                                                  (iii) Gases can be easily compressed and liquefied.