객관식Polystyrene is used to make Styrofoam cups. Which functional group is present in the repeating unit of polystyrene?135views
객관식Which of the following IR absorption bands would you expect to observe in the functional group region (4000–1500 cm^{-1}) for ethanol (CH_3CH_2OH)?106views
객관식Which of the following functional groups is commonly found in compounds that act as emulsifiers?108views
객관식Which type of linkage in starch is formed as a result of condensation reactions between glucose monomers?137views
객관식Which of the following best describes the function of a carbonyl group in organic chemistry?109views