Question

Which of the following is an ether? How can you tell?

`CH_3COCH_3`
`CH_3COOCH_3`
`CH_3OCH_3`
`CH_3CH_2OH`
`CH_3COOH`

Answer 1

`CH_3OCH_3`

Explanation:

The above molecule is dimethylether, in which two alkyl groups are bound to a single oxygen atom.
`CH_3COCH_3` is a ketone
`CH_3COOCH_3` is an ester
`CH_3CH_2OH` is an alcohol
`CH_3COOH` is a carboxylic acid