CHEM_354_Exam_2_Spring_2003

CHEM_354_Exam_2_Spring_2003 - NAME:_ Multiple Choice: 3...

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NAME:_______________________________________________________ Multiple Choice: 3 points each 1. In the 1 H NMR , in what region of the spectrum does one typically observe hydrogens bound to the aromatic ring? a. 1.0-1.5 ppm b. 2.0-3.0 ppm c. 4.5-5.5 ppm d. 7.0-8.0 ppm e. 9.0-10.0 ppm 2. How many distinct trichlorobenzene isomers are possible? a. 2 b. 3 c. 4 d. 5 e. 6 3. What is the hybridization of the end carbon of allene (1,2-propadiene)? a. sp b. sp 2 c. sp 3 d. p e. none of the above 4. When the relative energies of the s-cis and the s-trans conformers of 1,3-butadiene are compared, one finds a. that the s-cis conformer is lower in energy than the s-trans . b. that the s-trans conformer is lower in energy than the s-cis . c. that the two conformers are equal in energy. d. that the s-cis conformer is more stable than the s-trans . 5. Which of the following compounds absorbs the longest wavelength of UV-visible light? a. (E)-2-butene b. (Z)-2-butene c. 1,3,4-hexatriene d. 1,3-hexadiene e. 1,3,5-heptatriene 6. Absorption of UV-visible energy by a molecule results in a. vibrational transitions b. electronic transitions c. rotational transitions d. nuclear transitions e. none of the above 7. Which of the following compounds has the highest melting point? a.
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This note was uploaded on 02/09/2011 for the course CHEM 354 taught by Professor Wade during the Spring '11 term at Indiana.

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CHEM_354_Exam_2_Spring_2003 - NAME:_ Multiple Choice: 3...

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