Draw a labelled energy band diagram for a solid which is an insulator. What is the main difference between this diagram and that of a semiconductor?

What is meant by doping in semiconductors? What are $p$-type semiconductors?

Explain, how an intrinsic semiconductor can be converted into $n$-type semiconductor. Given one example and draw their energy band diagrams.

What do you understand by $p$- and $n$-type semiconductors? Distinguish between them on the basis of energy band diagram.

Distinguish between intrinsic and extrinsic semiconductors.

Explain briefly what is meant by extrinsic semiconductors, including the terms donor and acceptor impurities as well as $p$-type and $n$-type semiconductors.