Alkenes are a homologous series of unsaturated hydrocarbons – this means that their C atoms contain double bonds.
Alkenes are also called OLEFINS because they form oily liquids on reaction with chlorine gas.
Ethene is the number one organic chemical synthesized in the US and the world. The small quantities of ethane, propane, and butane found in natural gas are converted into ethene.
Alkenes are the raw materials for a number of plastics such as polyethylene, PVC, polypropylene, and polystyrene. See later.
Alcohols are compounds where a H atom is replaced by an OH group. They boil in general at higher temperatures to their corresponding alkane
Draw these out and name them.
CH3OH CH3CH2OH CH3CH2CH2OH
Carboxylic Acids, finally..
The parent chain must include the carboxyl carbon, (COOH) which, incidentally, is given position number 1. The name of the alkane attached is changed by replacing the -e with -oic acid. They have higher boiling points than the corresponding alkane.
You should be able to draw this one out CH3COOH – ethanoic acid (aka acetic acid, a weak acid and constituent of vinegar)