ex2A-2006-post

ex2A-2006-post - Chemistry 12 Exam 2 Form A March 1, 2006...

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Chemistry 12 Name _______________________ Exam 2 Form A Section _______________________ March 1, 2006 Student No._______________________ IMPORTANT : On the scantron (answer sheet), you MUST clearly fill your name , your student number , section number , and test form (white cover = test form A; yellow cover = test form B). Use a #2 pencil. There are 27 questions on this exam. Check that you have done all of the problems and filled in the first 27 bubbles on the scantron. The exam contributes maximum 35 points to the course grade. Your score on the exam will be reported in percents (max 100%). Exam policy No electronic devices, except for simple scientific calculators are allowed (specifically calculators with text-programmable memory or communication capabilities are not allowed). Relevant data and formulas, including the periodic table, are attached at the end of this exam. Your score will be based only on what is on the scantron form. The answer key will be posted on the web after the exam (under "News"). Hints As you read the question, underline or circle key words to highlight them for yourself. Avoid errors from "mis-reading" the question. Pay attention to units and magnitudes (decimal places) of numbers obtained from calculations. There is no penalty for guessing. 2 Chem 12, Exam 2 March 1, 2006 Form A --------------------------------------------------------------------------------------------------------------------- 1. Which of the following molecules has/have an atom that violates the octet rule? I. PCl 5 II. NF 3 III. BF 3 IV. CO 2 A. I B. II C. I and II only D. I and III only E. all of the above violate the octet rule --------------------------------------------------------------------------------------------------------------------- 2. Select the electron-domain geometry, molecular geometry and hybridization of carbon in the carbonate ion, CO 3 2 . domain geometry molecular geometry hybridization A. trigonal planar tetrahedral sp 2 B. trigonal planar trigonal planar sp 2 C. tetrahedral tetrahedral sp 3 D. trigonal pyramidal trigonal pyramidal sp 3 E. trigonal pyramidal trigonal planar sp 2 --------------------------------------------------------------------------------------------------------------------- 3. Rank the following compounds in order of increasing polarity: F H F H Cl H Cl H H F F H 123 A. 1 < 2 < 3 B. 1 < 3 < 2 C. 2 < 1 < 3 D. 2 < 3 < 1 E. 3 < 2 < 1 --------------------------------------------------------------------------------------------------------------------- 4.
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ex2A-2006-post - Chemistry 12 Exam 2 Form A March 1, 2006...

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