E2_f07_131 - CHE 131 Exam 2 Fall 2007 Multiple Choice On the Scantron form bubble in the letter of the one choice that best completes the statement

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CHE 131 Exam 2, Fall 2007 Multiple Choice On the Scantron form, bubble in the letter of the one choice that best completes the statement or answers the question. No credit will be given for multiple answers. ____ 1. Which one of the following molecules does not have a dipole moment? A. HCl B. BrCl 3 C. NCl 3 D. BCl 3 E. N 2 O ____ 2. Which of the following molecules or ions is not paramagnetic in its ground state? A. O 2 B. O 2 + C. B B 2 D. NO E. F 2 ____ 3. Which one of the following species has a trigonal bipyramidal electron pair structure? A. PH 3 B. IF 5 C. SF 4 D. [PCl 4 ] + E. SF 6 ____ 4. For which of the following diatomic molecules will the bond order become greater if an electron is removed, i.e., if the molecule is converted to the positive ion in its ground state. A. B B 2 B. C 2 C. P 2 D. F 2 E. Na 2
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____ 5. What is the electron configuration of the Mn 3+ ion? A. 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 B. 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 4 C. 1s 2 2s 2 2p 6 3s 2 3p 6 4s 1 3d 3 D. 1s 2 2s 2 2p 6 3s 2 3p 6 3d 7 E. 1s 2 2s 2 2p 6 3s 2 3p 6 3d 4 ____ 6. How many of the following statements are correct ? I. The motion of the electrons in a filled orbital gives rise to a permanent magnetic moment. II. The magnetic moment of an unpaired electron gives rise to ferromagnetism. III. A sample containing atoms (ions) with unpaired electrons may exhibit paramagnetism or ferromagnetism. IV. A sample containing atoms (ions) with unpaired electrons is always ferromagnetic. V. A paramagnetic sample does not create its own (macroscopic) magnetic field but is attracted by an outside magnetic field. A. 1 B. 2 C. 3 D. 4 E. 5 ____ 7. Which of the following statements about the carbonate ion, CO 3 2– , is false ? A. The ion is planar. B. One C–O bond is shorter than the others.
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This note was uploaded on 03/05/2010 for the course CHE 131 taught by Professor Kerber during the Fall '08 term at SUNY Stony Brook.

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E2_f07_131 - CHE 131 Exam 2 Fall 2007 Multiple Choice On the Scantron form bubble in the letter of the one choice that best completes the statement

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