Answer:
Molecular
solids : Refer ans. 3(iv)
Types of molecular solids :
Molecular solids are of three types
(a) Non-polar molecular solids
(b) Polar molecular solids
(c) Hydrogen bonded molecular solids
(a) Non-polar molecular solids : Molecular solids which consist
of either atoms or molecules formed by non-polar covalent bonds are called
non-polar molecular solids.
Example : Ar, He, 
Naphthalene,
etc.
In these solids constituent atoms or molecules are held by
weak London-dispersion forces.
(b) Polar molecular solids : Molecular solids which
consist of polar covalent molecules are called polar molecular solids.
Examples : Solid 
solid
etc.
In these solids molecules are held together by relatively strong
dipole-dipole interaction. Therefore, melting points of these solids are higher
than non-polar molecular solids.
(c) Hydrogen bonded molecular solids Molecular solids in
which molecules are held together by intermolecular hydrogen bonds are called
hydrogen bonded molecular solids.
Example : Ice 
Properties of molecular solids
(a) These are soft solids.
(b) These are insulators of heat and electricity.
(c) They have low melting points.
You need to login to perform this action.
You will be redirected in
3 sec
