JEE Main levelSingle correct optionDifficulty 2 of 3pl201
PLA is prepared from lactic acid. The monomer and the type of linkage are
A2-aminopropanoic acid; ester linkages formed by condensation
B3-hydroxypropanoic acid; amide linkages formed by condensation
C2-hydroxypropanoic acid; carbon-carbon bonds formed by addition
D2-hydroxypropanoic acid; ester linkages formed by condensation
Answer: D
Lactic acid is 2-hydroxypropanoic acid, CHX3−CH(OH)−COOH. Its −OH and −COOH groups condense with loss of water to form ester links, so PLA is a polyester.