Question

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Give reason

(a) A gas fills completely the vessel in which it is kept.

(b) A gas expert pressure on the walls of the container.

(c) A wooden table should be called a solid.

(d) We can easily move our hand in air but do to the same through a solid block of wood we need a karate kept.


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Answer 1

Answer:

a. The force of attraction between particles of gas is negligible. Because of this, particles of gas move in all directions. Thus, a gas fills the vessel completely in which it is kept. ... Because of this a gas exerts pressure on the walls of the container in which it is kept.

b.The molecules are continually colliding with each other and with the walls of the container. When a molecule collides with the wall, they exert small force on the wall The pressure exerted by the gas is due to the sum of all these collision forces.The more particles that hit the walls, the higher the pressure.

c. t has definite shape and volume, there is intermolecuer attraction between and particles are closely packed

d.We can easily move our hand in air but to do the same through a solid block of wood we need a karate expert. Answer: (a) The particles of a gas are constantly moving in all the directions with different speeds. Therefore they do not have a fixed volume and hence completely fill the vessel in which they are kept

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Answer 2

a).The force of attraction between particles of gas is negligible. Because of this, particles of gas move in all directions. Thus, a gas fills the vessel completely in which it is kept. ... Because of this a gas exerts pressure on the walls of the container in which it is kept................

B).The molecules are continually colliding with each other and with the walls of the container. When a molecule collides with the wall, they exert small force on the wall The pressure exerted by the gas is due to the sum of all these collision forces.The more particles that hit the walls, the higher the pressure........

c).A wooden table is a rigid object having a definite shape and definite volume. ... A solid has a fixed shape because the particles of a are closely packed and their positions are fixed due to the strong Force of attraction between them. A solid has a fixed volume because the spaces between its particles are fixed.............

d. The particles of a gas are constantly moving in all the directions with different speeds. Therefore IT IS EASY TO MOVE HAND IN AIR..

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