Characteristics of State of Matter - Science, Class 9 Video Lecture

you see this bottle it's a solid and
because it's a solid it has a fixed size
fixed shape and volume and the particles
inside solids have very strong
intermolecular forces and these
particles are very closely packed so
that there is almost no space between
them and because of which they have very
low compressibility you can't compress
them easily let's now look at water in a
container now water is a liquid the
intramolecular forces in liquids are
neither too weak nor too strong because
of that their particles are free to move
anywhere within the liquid but hey they
cannot escape
so liquids do have a fixed volume but as
you know they don't have a fixed shape
in fact if I pour this let's say into a
glass what do you see they take the
shape of the container in which they are
kept and particles in liquids do have
some space between them and because of
that they are more compressible than
solids but what about gases by now you
would have guessed the intermolecular
forces of attraction and gases are
almost negligible so gases do not have a
fixed shape size or volume and since the
particles and gases have large spaces
between them they are highly
compressible