Missballinger
Practice Exam Questions:Which of the following would be the most suitable analytical technique to determine the ratio of 235U to 238U in a sample of uranium metal?A. mass spectroscopyB. gas liquid chromatographyC. atomic absorption spectroscopyD. nuclear magnetic resonance spectroscopyWhen a sample absorbs infrared radiationA. covalent bonds are broken.B. covalent bonds stretch and vibrate.C. the spin alignment of certain nuclei changes.D. electrons in atoms move to higher energy levels. The graph shows the absorption spectra of three food dyes: Blue No. 1, Red No. 2 and Yellow No. 4.Which one of the following is the best wavelength to determine the concentration of Red No. 2 dye in a solution containing a mixture of all three dyes?A. 430 nmB. 500 nmC. 540 nmD. 620 nm23336255715Using the Infrared absorption data, identify the atoms and the bonds between them that are associated with the absorption labelled A on the infrared spectrum. The most appropriate technique to determine levels of the Pb2+ ion in blood isA. mass spectrometry.B. infrared spectroscopy.C. atomic absorption spectroscopy.D. high-performance liquid chromatography.The structure that is formed from the addition reaction between but-2-ene and Cl2 isConsider the structures below.Which structure is that of 2,2,4 trimethylpentane?a) I and III onlyb) I and IV onlyc) II and III onlyd) II and IV only Halothane is a general anaesthetic. The diagram below outlines the reaction pathway for the formation of halothaneWhich of the following correctly identifies the reaction occuring in step 2 and correctly states the systematic name of product X?The amount of copper in a solution of copper(II) sulfate can be determined using atomic absorption spectroscopy. When a blue copper (II) sulfate solution is introduced into an atomic absorption spectrometer, a green flame is observed. Consider the following.I) A copper (II) sulfate solution appears blue because it abosrbs red light.II) The metal species undergoes oxidation in the flame.III) The flame is green due to electron transitions from a higher energy state to a lower energy state.Which of the above statement are true?a) ! onlyb) I and III onlyc) II and III onlyd) I, II and IIIA sample of compound M is analysed in a mass spectrometer where it forms the molecular ion M+according toM + e– → M+ + 2e-Some of the molecular ions fragment as follows.M+ → A+ + B andM+ → A + B+32004001174115The mass spectrum would show peaks due to the speciesA. M+, A, A+, B and B+ only.B. M+, A+ and B+ only.C. A+and B+ only.D. A and B only.What is the correct systematic name for the following compound?A. 2-ethyl-3-methylpentaneB. 3-methyl-4-ethylpentaneC. 3,4-dimethylhexaneD. 2,3-diethylbutane A carboxylic acid can be clearly determined using IR because of:A. the intense band near 1700 cm-1 as well as a strong band at 750 cm-1.B. its distinctive fingerprint region.C. the intense band near 1700 cm-1 and a broad band near 3500 cm-1.D. the intense band near 1700 cm-1 and a broad band near 3000 cm-1.Textbook Questions to try:Ch 7 Q 13, 14, 15,27, 28, 29 (IR) Q19 (flame tests)P127 Q26 – IR and NMR combo ................
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