Question

8. The nass spectrum of which compound has M and N+2 peaks of approxinately equal intensity? A) 3-bromopentane B) 3-pentanol C) pentane D) 3-chloropentane E) 3-iodopentane 9. Consider the structure isomers. 1-bromopropane (A) and 2-bromopropane (B) respectively. How many unique proton peaks are in es H NMR? A) A: 4 types, B: 4 types B) A: 3 types, B: 2 types C) A: 2 types, B: 3 types D) A: 8 types, B: 8 types E A: 4 types, B: 8 types 10. What compound exhibits only two aignals in its H NMR apeet rum, a triplet and a quintet? OCH (CH,)a 11. Which of the following molecules has a chatacteristic stretch at 2200 cm 2 12. Which of the following molecules has a characteristia m/z peak at an abundance f 862 Α) 2-butene B) methylcyclopropane C) 2-propanol, D) ethene E, hexane 13, which compound has a strong and broad IR absorption centered at 3400 cm.'? A) cyclopropane BI octane c) diethyl ether D) 1-butano Ebenzene 14. Which of the following factors influences the intensity of a peak in the IR spectzum of a molecule? A) mass of atoms B) dipole noment C) bond strength D) bond 1ength D) bond angle 15. The mass spectrum of alcohols often fails to exhibit detectable M peaks, but instead show relatively large peaks A) M-16 B) M-18 C) M+1 D) M+2 E) 2 (M+1 16 What is commonly used as an internal reference in NMR spectroscopy: its signal is assigned -0 in 'H spectroscopy? A) (CH,CH2),s Name Page 12

Answer 1