1. The structures of morphine, heroin, aspirin and ibuprofen are given in Section 37 of the databooklet. Explain how infrared spectroscopy can be used to distinguish between:(a) morphine and heroin.(b) aspirin and ibuprofen.2. Raoult’s law states that for an ideal solution the partial vapour pressure of each component equals the vapour pressure of the pure component multiplied by its mole fraction.