Rank the compounds in each of the following groups in order of decreasing acidity: (a) Acetic acid,

Question:

Rank the compounds in each of the following groups in order of decreasing acidity:
(a) Acetic acid, ethane, ethanol
(b) Benzene, benzoic acid, benzyl alcohol
(c) Propanedial, 1,3-propanediol, propanedioic acid, propanoic acid
(d) Acetic acid, ethanol, trifluoroacetic acid, 2,2,2-trifluoroethanol, trifluoromethanesulfonic acid (CF3SO2OH)
(e) Cyclopentanecarboxylic acid, 2,4-pentanedione, cyclopentanone, cyclopentene