PDF chapter test TRY NOW

Answer the following question:
 
Give reasons:

(a). A gas fills completely the vessel in which it is kept.
(b). A gas exerts pressure on the walls of the container.
(c). A wooden table should be called a solid.
(d). We can easily move our hand in the air but to do the same through a solid block of wood we need a karate expert.

a. The particles have a negligible force of attraction between them; hence, they are very loosely bound. Hence, a gas fills the vessel in which it is kept.

b. They have high and negligible attraction force to move constantly with high speed in all directions. Due to this intense random motion of particles, the particles hit each other and hit the container walls with force. These collisions of the gas particles with the container walls exert pressure on the walls of the container.

c. Reason: It has a and volume. It is very rigid and cannot be compressed, i.e., it has a solid characteristic.

d. in gases are loosely packed compared to solid molecules, which are densely packed. So we can easily break the force of attraction when we move our hand through the air, but it is difficult to break through a solid due to the greater forces of attraction between molecules. So we need a karate expert to break the solid block of wood.