Question

Give two reasons to justify-
(a) water at room temperature is a liquid.
(b) an iron almirah is a solid at room temperature.​

Answer 1

a) Water is a liquid because of the following two reasons :

(i) liquids do not have a fixed shape : They take the shape of the container in which they are kept

(ii) Liquids have a fixed volume : Take 100 ml of water in a beaker. Transfer it to a glass, It still remains same, therefore, water is a liquid.

(b) An Iron almirah   is a solid at room temperature due to following reasons :

(i) Iron almirah has a fixed shape and a fixed volume

(ii) If we apply force in limits, the volume of iron almirah cannot changed, hence it is in compressible, So it is a solid.

Answer 2

Answer:

A. The boiling point of water is 100°c and the room temperature is lower than it

B. The melting point of iron is 1538°c and the room temperature is lower than it