Salicylic acid is warmed with ethanoic anhydride and a few drops of conc. H2SO4 to make aspirin. The group of salicylic acid that is acetylated is

the phenolic -OH, giving an ester

both the -OH and the -COOH groups

a ring C-H, by Friedel-Crafts acylation

the phenolic -OH, giving an ester

the -COOH, giving a mixed anhydride

JEE Main levelSingle correct optionDifficulty 2 of 3ap100

Salicylic acid is warmed with ethanoic anhydride and a few drops of conc. $H X_{2} SO X_{4}$ to make aspirin. The group of salicylic acid that is acetylated is

Aspirin is 2-acetoxybenzoic acid,

2 - CH X_{3} COO - C X_{6} H X_{4} - COOH

. The phenolic OH is acetylated to an ester, and the carboxylic acid group remains free, which is why aspirin still liberates

CO X_{2}

from

NaHCO X_{3}

and no longer gives a violet colour with

FeCl X_{3}