Final answer:
There are two homologous series of compounds involved in the production of ethanol from petroleum.
Step-by-step explanation:
The production of ethanol from petroleum involves several chemical reactions. One common method is the fermentation of sugars obtained from petroleum-based sources, such as corn or sugarcane. This process yields ethanol as the main product. Another method involves the conversion of ethylene, which is derived from petroleum, into ethanol through a sequence of reactions.
Therefore, there are two homologous series of compounds involved in the production of ethanol from petroleum.