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Unformatted text preview: 1) To what can the sharp peak at 3430 cm-1 be attributed? a. non hydrogen bonded OH stretch b. overtones of the C=O stretch c. a N-H stretch d. the hydroxyl OH stretch of the hydrate 2) The spectrum above displays which of the following? a. a hydroxyl OH stretch b. a C-C stretch c. an aliphatic C-H stretch d. all of the above 3) If benzoic acid is added into a Fask containing aqueous acid and diethyl-ether, where will it reside? a. aqueous acid layer b. precipitate at the bottom c. diethyl ether layer d. dichloromethane layer 4) Consider the following IR spectra, which of the following statements appear to be inconsistent (not true). A. B. C. a. Compound A is an alkene b. Compound B is an alkyne c. Compound C is an secondary amine d. Both B and C are not true 5) In order to take an IR of a solid sample you could: a. Make a KBr pellet b. Use a Nujol c. Dissolve in CHCl 3 and deposit as a thin lm d. All of the above 6) The recorded IR spectrum encompasses: a. 3000 and 1000 cm-1 b. 1000 and 400 cm-1 c. 6000 and 500 cm-1 d. 4000 and 400 cm-1 Chemistry and Biochemistry page 1 of 6 Chem 6a University of California at Santa Barbara, Name of TA Student Name Quiz2 7) Compound A has a Rf = 0.5, compound B has a Rf = 0.9, and compound C has a Rf = 0.1. Assuming a normal phase TLC plate, which compound is the most polar: a. Compound A b. Compound B c. Compound C 8) Which of the following is a Non-destructive visualization technique for TLC: a. UV/Vis b. Iodine staining c. KMnO4 staining d. Both b and c 9) Which of the following is a polar solvent that can be used for normal phase TLC: a. Hexanes b. Carbon tetrachloride c. Petroleum ether d. Methanol 10) The mobile phase in gas chromatography can be: a. Methanol b. Helium c. Chloroform d. All of the above 11) Thin layer chromatography plates coated with which of the following substances would give the great # of theoretical plates a. Sodium sulfate b. Magnesium sulfate c. Silica gel d. Molecular sieves 12) Using your understanding of Hookes law which bonds should show the highest wavenumber in the IR?...
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This note was uploaded on 04/21/2010 for the course CHEM Chem 6BL taught by Professor Pettus during the Fall '05 term at UCSB.
- Fall '05
- Hydrogen Bond