Which from the following is $NOT$ an example of an amorphous solid?

Which of the following is the composition of glass?

Explain the structure of diamond and graphite.

Classify the following solids in different categories based on the nature of intermolecular forces operating in them:
Potassium sulphate,tin,benzene,urea,ammonia,water,zinc sulphide,graphite,rubidium,argon,silicon carbide.

'Stability of a crystal is reflected in the magnitude of its melting points'. Comment. Collect melting points of solid water,ethyl alcohol,diethyl ether and methane from a data book. What can you say about the intermolecular forces between these molecules?

The sharp melting point of crystalline solids is due to