What is the word
:homologues series means
.
Simply explain how ethene can be prepared from ethanol.

Homo - means same, Homologous in science means things that are very similar.
In organic chemisrt a homologous series is a set of chemicals with similar properties like a similar formula and properties. This is usually because they have the same functional group, for example a hydroxyl in alcohols.

Ethanol is ethane with a hydrogen molecule replaced by a hydroxyl radical, you need to think and look at your notes to work out how to remove the hydroxyl. It is a dehydration reaction converting an alcohol to an alkene. Look this up and you will have your answer.

Post if you get stuck

Hope this is the answer you are looking for

Ethanol - Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/Ethanol#Ethylene_hydration)