TEST3 - General Chemistry 1035 Test 3(Tuesday) Form A (1)...

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Unformatted text preview: General Chemistry 1035 Test 3(Tuesday) Form A (1) There are 25 questions in this test. (2) Make sure you have bubbled in the correct student number. Failure to do so will result in an automatic zero. Produced with a Trial Version of PDF Annotator - www.PDFAnnotator.com 1. Which of the following elements has the greatest atomic radius? A. B. C. D. E. Li Ne Rb Sr Xe 2. Which of the following elements has the largest first ionization energy? A. B. C. D. E. Na Cl Ca Te Br 3. Which of the following has the most negative electron affinity? A. B. C. D. E. H Li Na K Rb 4. What is the correct order of decreasing size of the following ions? A. B. C. D. E. P3ˉ > Clˉ > K+ > Ca2+ Ca2+ > K+ > Clˉ > P3ˉ K+ > Clˉ > Ca2+ > P3ˉ K+ > Clˉ > P3ˉ > Ca2+ None of these choices is correct. 5. Which of the following contains covalent bonds? A. B. C. D. E. BaO IBr Mg LiBr Cu 6. Select the strongest bond in the following group. A. B. C. D. E. C C C C C S O C N F 7. Which of the following elements is the least electronegative? A. B. C. D. E. Si Se S Sc Sr Produced with a Trial Version of PDF Annotator - www.PDFAnnotator.com 8. Select the best Lewis structure for ClCN. A. B. C. D. E. 9. In carbon disulfide, how many lone pairs of electrons are on each sulfur atom? A. B. C. D. E. 0 1 2 3 4 Produced with a Trial Version of PDF Annotator - www.PDFAnnotator.com 10. Select the Lewis structure in which formal charges are minimized for the periodate anion, IO4ˉ. A. B. C. D. E. Produced with a Trial Version of PDF Annotator - www.PDFAnnotator.com 11. The formal charges on Cl and O in the structure shown for the ClOˉ ion are, respectively: A. B. C. D. E. 0 and ‐1 ‐1 and 0 1 and ‐2 ‐2 and 1 None of these choices is correct. 12. In which one of the following species is the central atom (the first atom in the formula) an exception to the octet rule? A. B. C. D. E. NH3 NH4+ I2 BH4ˉ SF6 13. Which of the following atoms can expand its valence shell when bonding? A. B. C. D. E. N C O P Al Produced with a Trial Version of PDF Annotator - www.PDFAnnotator.com 14. Considering all the bonds in a molecule with trigonal bipyramidal geometry, what are the bond angles present? A. B. C. D. E. 120° only 90° only 180° only 60° and 90° only 90°, 120° and 180° 15. According to VSEPR theory, a molecule with the general formula AB2E3 will have a _____ molecular shape. A. B. C. D. E. bent linear trigonal planar T‐shaped trigonal pyramidal 16. What is the molecular shape of ClCN as predicted by the VSEPR theory? (Carbon is the central atom.) A. B. C. D. E. linear bent angular trigonal None of these choices is correct. Produced with a Trial Version of PDF Annotator - www.PDFAnnotator.com 17. What is the molecular shape of XeO2F2 as predicted by the VSEPR theory? A. B. C. D. E. square planar tetrahedral square pyramidal see‐saw octahedral 18. Which one of the following molecules does not have a dipole moment? A. B. C. D. E. CS2 H2S CH2Cl2 PH3 CH2O 19. A molecule with the formula AB4 uses _________ to form its bonds. A. B. C. D. E. sp hybrid orbitals sp2 hybrid orbitals sp3 hybrid orbitals sp3d hybrid orbitals sp3d2 hybrid orbitals Produced with a Trial Version of PDF Annotator - www.PDFAnnotator.com 20. Valence bond theory predicts that sulfur will use _____ hybrid orbitals in sulfur dioxide, SO2. A. B. C. D. E. sp sp2 sp3 sp3d sp3d2 21. How many sigma and pi bonds, respectively, are in the molecule below? CH3CH2CHCHCH3? A. B. C. D. E. 16, 1 16, 0 15, 1 15, 0 14, 1 22. According to molecular orbital (MO) theory, the 12 outermost electrons in the O2 molecule are distributed as follows: A. B. C. D. E. 12 in bonding MOs, 0 in antibonding MOs. 10 in bonding MOs, 2 in antibonding MOs. 9 in bonding MOs, 3 in antibonding MOs. 8 in bonding MOs, 4 in antibonding MOs. 7 in bonding MOs, 5 in antibonding MOs. Produced with a Trial Version of PDF Annotator - www.PDFAnnotator.com 23. Which of the lines on the figure below is the best representation of the relationship between the volume and the number of moles of a gas, measured at constant temperature and pressure? A. B. C. D. E. a b c d e 24. A 0.850‐mole sample of nitrous oxide, a gas used as an anesthetic by dentists, has a volume of 20.46 L at 123°C and 1.35 atm. What would be its volume at 468°C and 1.35 atm? A. B. C. D. E. 5.38 L 10.9 L 19.0 L 38.3 L 77.9 L 25. What are the conditions of STP? A. B. C. D. E. 0 K and l atm 273.15 K and 760 torr 0°C and 760 atm 273.15°C and 760 torr None of these choices is correct. ...
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