객관식Polystyrene is used to make Styrofoam cups. Which functional group is present in the repeating unit of polystyrene?154views
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)?134views
객관식Which of the following functional groups is commonly found in compounds that act as emulsifiers?144views
객관식Which type of linkage in starch is formed as a result of condensation reactions between glucose monomers?171views
객관식Which of the following best describes the function of a carbonyl group in organic chemistry?134views