1) Alcohol in antifreeze 
In organic chemistry, isopropyl is a propyl with a group attached to the secondary carbon. If viewed as a functional group an isopropyl is an organic compound with a propyl group attached at its secondary carbon.The bond is therefore on the middle carbon. In IUPAC nomenclature the group isopropyl is denoted with the suffix propan-2-yl. For example...
containing the isopropyl group.