III) Multiple Choice - For each question, choose the best answer and write your answer in the space provided. For True or False questions, write T for True and F for False. If a question asks for a number, write in a number instead. Determine the double bond equivalence (DBE, or IHD, or DoU) of the following molecules: H b) CsH NOCI DBE: c) C3H1602F2 DBE: Br a) DBE: d) Circle which fragment(s) below that will not show up on a mass spectrum. Why not? t e) Which molecule is IR inactive? A) O=Si=0 B) HC=CH C) BF3 D) BrBr E) None of these f) Which pairs of molecules would be most easily distinguishable using IR spectroscopy? . , a) c) HO Br Br b) Linn d) g) True or False: The IR fingerprint region cannot be used by chemists to help determine an unknown compound's structure