Select one which is alcohol.

Explanation

An alcohol is an organic compound that carries at least one hydroxyl functional group (−OH) bound to a saturated carbon atom, hence CH3-CH2-OH is an alcohol. CH3-CH2-Br is an example of an alkyl halide (also known as haloalkanes) which are compounds in which one or more hydrogen atoms in an alkane have been replaced by halogen atoms (fluorine, chlorine, bromine or iodine). Ethers are a class of organic compounds that contain an ether group-an oxygen atom connected to two alkyl or aryl groups. They have the general formula R-O-R′, where R and R′ represent the alkyl or aryl groups. Therefore CH3-O-CH3 is an ether. CH3COOH is a carboxylic acid that is an organic acid which contains a carboxyl group (C(=O)OH) attached to an R-group. The general formula of a carboxylic acid is R-COOH, with R referring to the alkyl, alkenyl, aryl, or other group.