Define homologous series of carbon compound. List any two characteristics of a homologous series.

Explanation

### Step-by-Step Solution:

1. **Definition of Homologous Series**:
A homologous series is a group of organic compounds that share the same functional group and have a similar chemical structure, but differ in the length of their carbon chains. This means that each compound in the series has one more carbon atom than the previous one.

2. **Characteristics of a Homologous Series**:
- **Characteristic 1**: Members of a homologous series can be synthesized using the same general method of preparation. For example, all alkanes can be prepared using similar reactions or processes.
- **Characteristic 2**: Two successive members of a homologous series differ by a -CH2- unit in their molecular formula, which corresponds to an increase of 14 units in molecular weight.