Question

give reasons:
A.a gas completely fills the vessel in which it is kept.
B.a gas exerts pressure on the walls of the container.
C.a wooden should be called a solid​

Answer 1

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

B)..a gas exerts pressure on the walls of the containerThe 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 should be called a solidSince a wooden table has these basic characteristic of solid state( rigidity ,definite shape and definite volume), itshould be called a solid. 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.

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Answer 2

Because in the wooden table particles are closely packed and have less space in between particles.