What is the word
:homologues series means
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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.

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Hope this is the answer you are looking for

Ethanol - Wikipedia, the free encyclopedia