CHEMISTRY [2 Mark Question Answer]

Basis of comparison	SOLID	LIQUID	GAS
Intermolecular spaces	Solids have very less intermolecular spaces	Liquids have small intermolecular spaces, which is more than the solid	Gases have very large intermolecular spaces.
Intermolecular forces	Solids have very strong Intermolecular forces of attraction	Liquids have less Intermolecular forces of attraction than the solids.	Gases have negligible Intermolecular forces of attraction
number of free surfaces	solids have infinite number of free surfaces	Liquids have only one free surfaces	Gases have no free surfaces
compressibility	Solids cannot be compressed	Liquids can be very slightly compressed	Gases can be easily compressed

Gasses fill up the space available to them because gases don’t have definite size, shape and boundary due to less attractive forces between particles. Random motion of their particles exerts pressure in all directions, and occupy any space available to them.

Five characteristics of a gases are :-
no definite shape
no definite volume
high intermolecular space
least intermolecular force of attraction.
Gases are fluid, and flow easily.

Gas is the state in which matter expands to occupy the volume and shape of its container

The molecules in a liquid have more kinetic energy and more intermolecular spaces as compared to solids. Thus, molecules can change their positions within the liquid. So, liquids have definite volume, but not definite shape. They can flow and always take the shape of the containing vessel.

Five characteristics of a liquid are : -
No definite shape (takes the shape of its container).
Has definite volume.
Particles are free to move over each other, but are still attracted to each other.
Liquid cannot be compressed much
The intermolecular forces of attraction are weaker than solids.

Liquid is the state in which matter adapts to the shape of its container but varies only slightly in volume

Solid has high forces of attraction between their particles therefore they have very less space between them. They do not move but they vibrate. Therefore solids can’t flow they can be heaped.

Five characteristics of a solid are
definite shape.
definite volume.
there is strong intermolecular forces.
very less intermolecular space.
Solids are known to have high density.

Solid is the state in which matter has a fixed volume and shape.

The term matter refers to anything that occupies space and has mass.

A group of two or more than two atoms of the same or different elements that are chemically bonded together is called a molecule.

An atom is the smallest unit of an element.

An element is a pure substance that cannot be broken down by any physical or chemical means into simpler substances.