NY Regents Chemistry Exam June 2022
44 At STP, propanal and propanone have different chemical properties due to their different
(1) molecular masses
(2) empirical formulas
(3) percent compositions
(4) functional groups
Explanation: Both propanal and propane are organic molecules. Each one has a different ending in their names, signifying a different functional group. According to Table R on the Reference Table, propanal is an aldehyde while propanone is a ketone.
Answer: 4