Chemistry midterm 2 2004

Chemistry midterm 2 2004 - Midterm 2 Fall 2004 1 Three of...

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Midterm 2 Fall 2004 Page 1 1. Three of the molecular shapes which a sp 3 d hybridized molecule can have are: A. triangular, trigonal bipyramid, linear B. linear, square planar, T-shaped C. irregular tetrahedron, T-shaped, bent D. T-shaped, linear, trigonal bipyramid E. none of these is correct 2. Which of the following must be paramagnetic? A. F 2 B. N 2 C. SO 2 + D. H 2 E. ClO 2 - 3. In a plutonium bomb such as the one used over Nagasaki, the nuclear explosion occurs when A. two masses of fissionable material are placed against each other. B. the fissionable material is compressed with conventional explosives. C. a fission reaction triggers the chain reaction. D. a source of protons is injected in the fissionable material so as to achieve critical mass. E. critical mass is achieved by compressing two masses of tritium against each other with conventional explosives. 4. According to the band theory, which of the following provide(s) an explanation for the high electrical conductivity of metals? 1. a partly filled conduction band 2. a valence band overlapping an empty conduction band 3. a filled valence band 4. a large gap between the valence band and the conduction band A. 1, 2 B. 1, 3 C. 3 D. 3, 4 E. 4 5. Which of the following was NOT a factor in the Chernobyl disaster? A. loss of coolant B. explosion of hydrogen C. hydrogen fusion reactions D. high pressure E. high temperatures
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Midterm 2 Fall 2004 Page 2 6. Which is the most paramagnetic species? A. Si B. Mg C. Ni D. Ag E. Nb 7. According to the M.O. theory the removal of an electron from the C 2 molecule will have what effect? (pick the best answer) A. It will cause the bond order to increase and the ion will be diamagnetic B. It will cause the bond order to decrease and the ion will be diamagnetic. C. It will cause the bond order to increase and the ion will be paramagnetic. D. It will cause the bond order to decrease and the ion will be paramagnetic. E. It will cause the bond order to decrease but will have no effect on the magnetism. 8. List in order of increasing ionization potential: O, Mg, Rb, S, Si a) Si < S < Rb < Mg < O b) Mg < O < Rb < S < Si c) S < Si < Mg < O < Rb d) Rb < Mg < Si < S < O e) Si < O < Mg < Rb < S A. b B. d C. e D. d
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Midterm 2 Fall 2004 Page 3 9. Which represents the best distribution of electrons among orbitals for the central nitrogen atom in NNN .. .. .. .. _ [ ] A. s p B. p s C. s p 2 p D. p s p E. sp 3 10. OMIT Which one of the following statements concerning ozone depletion is correct?
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Chemistry midterm 2 2004 - Midterm 2 Fall 2004 1 Three of...

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