110_Sp10_ex2_A - CHEMISTRY 110 EXAM 2 March 1 2010 Form A-1...

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CHEMISTRY 110 EXAM 2 March 1, 2010 Form A ------------------------------------------------------------------------------------------------------------ 1. How many sigma and pi bonds are present in the following molecule? N O O N N H H H H A. 16 sigma bonds, 3 pi bonds B. 16 sigma bonds, 6 pi bonds C. 15 sigma bonds, 3 pi bonds D. 12 sigma bonds, 3 pi bonds E. 20 sigma bonds, 3 pi bonds ------------------------------------------------------------------------------------------------------------ 2. Which of the following species exhibits delocalized bonding? ------------------------------------------------------------------------------------------------------------
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------------------------------------------------------------------------------------------------------------ 3. Which of the following statements is FALSE? ------------------------------------------------------------------------------------------------------------ 4. Which of the compounds below would react with bromine (Br 2 ) at room temperature? ------------------------------------------------------------------------------------------------------------ 5. Which intermolecular force is responsible for the fact that ice is less dense than liquid water? A. London dispersion forces B. dipole-dipole forces C. ion-dipole forces D. hydrogen bonding E. ionic bonding ------------------------------------------------------------------------------------------------------------
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------------------------------------------------------------------------------------------------------------ 6. Which of the following molecules do NOT have free rotation about the bond between the carbon atoms? i. C 2 H 6 ii. C 2 H 4 iii.C 2 H 2 ------------------------------------------------------------------------------------------------------------
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