Question

3. 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 air but to do the same
through a solid block of wood
we need a karate expert.
4. Liquids generally have lower
density as compared to solids.
But you must have observed that
ice floats on water. Find out why.​

Answer 1

a)the particles of gas randomly with great speed and the gas particles have weak forces of attraction and loosely packed so they fill the container in which it is kept. Zygrade ans is copied from Google

Answer 2

3a. Because gases have very loosely packed atoms.

b. Because gases have changing volumes.

c. Because it has a definite shape and volume.

d. In air there is a lot of space between atoms but in wood there is not.

4. Ice has a cage like molecular structure and in that cage like spaces, air gets filled and that's why it floats on water.

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