1. Name the following molecules:

2. Sketch the following molecules:3-cyclohexenone4-ethyl 2,2,5-trimethyl 3-hexanoneethyl butyratepentanoic acid2-chloro 4-methyl 2,5-heptadienal3,4-dichloro 4-ethyl octanalp-chloro phenol3-bromo 2-chloro 4-methyl hexane3-cyclopropyl 1,2-cyclopentanediolmethyl phenyl ether3,5-dimethyl 2-heptene-4,5-diol

3. Give two different uses for ethanol.

4. Name two categories of organic compounds (alkanes, aldehydes…) that have very strong characteristic odours.