Low melting point is expected for a solid of which type?

What is a semiconductor? Describe the two main types of semiconductors and contrast their conduction mechanism.

Classify crystalline solids with explanations of their examples and properties.

In $n$-type semiconductors,the conduction of electricity is primarily due to which of the following?

The existence of a substance in more than one solid modification is known as

'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?