Variety is key in developing an understanding of organic chemistry. There are hundreds of functional groups-- not just a few.

We introduce halides just to point out how varied organics can be. Generally speaking, halides react with hydroxide (base) to form alcohols. Alcohols can be converted into halides.

Halides generally are named by giving the position and identity of the halogen. Trivial names for halides usually come from the name of the corresponding alkyl group followed by the name of the halogen.