Question

give reason:
1. a gas fills completely The vessel in which it is kept
2. a gas exert pressure on the walls of the container
3. a wooden table should be called a solid
4. we can easily move our hand in air but to do the same thought a solid block of wood we need a Karate expert.

Answer 1

1) because the particles of gas are loosely packed and they move in random motion in the vessel

Answer 2

1: )because the particles of gas are very expansinable

2:)because gas molecules have high kinetic energy

3:)because the molecules of the wood table are look very close to each other. .
for this it has strong intermolecular forces which is the main property of solid

4:)this is because in air there are weak intermolecular forces as it there are large space between them so we can move
but in solid having strong intermolecular forces bind together its constituent very strongly..so because of not having space we need a strong force to break it.

thanks bhai for asking question..