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practiceexam2 - Create assignment 54700 Practice 2 Oct 17...

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Create assignment, 54700, Practice 2, Oct 17 at 3:38 pm 1 This print-out should have 37 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. The due time is Central time. Brodbelt CH301 PRACTICE EXAM 2 Note: This practice exam is very long be- cause it bridged two exams from the past. The real exam on November 7 will not be this long. Expect 30 problems. Brodbelt 013 315 10:09, general, multiple choice, > 1 min, fixed. 001 N 2 has a shorter inter-nuclear distance than O 2 because 1. False; O 2 has a shorter bond length be- cause oxygen has six valence electrons but nitrogen has only five. 2. nitrogen is less electronegative than oxy- gen. 3. N 2 is more polar than O 2 . 4. N 2 has a linear geometry whereas O 2 is angular. 5. False; N 2 and O 2 have the same bond lengths because both are covalent diatomic molecules. 6. N 2 is triple-bonded but O 2 is double- bonded. 7. False; O 2 has a shorter bond length be- cause oxygen is more electronegative than ni- trogen. CIC T02 39 10:09, general, multiple choice, < 1 min, wording-variable. 002 How many shared electrons do triple bonds have? 1. 6 2. 1 3. 3 4. 2 5. 4 6. 8 7. 7 8. 5 Brodbelt 07 25 11:02, general, multiple choice, > 1 min, fixed. 003 The Lewis dot structure of CO 2 - 3 has how many total electrons and how many shared electrons? 1. 24; 8 2. 24; 6 3. 32; 8 4. 32; 6 5. 24; 10 6. 32; 10 CIC T06 38 11:02, general, multiple choice, < 1 min, fixed. 004 Which Lewis structure best represents the nitrate ion? (All outer shell electrons are shown.) 1. N O O O -
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Create assignment, 54700, Practice 2, Oct 17 at 3:38 pm 2 2. N O O O - 3. N O O O - 4. N O O O - Mlib 03 1089 11:02, general, multiple choice, > 1 min, fixed. 005 The number of shared electrons that should appear in the dot formula for the perchlorate ion (ClO - 4 ) is 1. 2. 2. 4. 3. 6. 4. 8. 5. 10. Brodbelt 798 12:50, general, multiple choice, < 1 min, fixed. 006 When carbon is the central atom in a com- pound, it may have all of the following config- urations EXCEPT 1. four regions of high electron density con- sisting of four single-bonded atoms. 2. three regions of high electron density consisting of two single-bonded atoms and a double-bonded atom. 3. two regions of high electron density con- sisting of a triple-bonded atom and a single- bonded atom. 4. two regions of high electron density con- sisting of two double-bonded atoms. 5. three regions of high electron density con- sisting of two double-bonded atoms and one single-bonded atom. Brodbelt 8200410 11:04, general, multiple choice, < 1 min, fixed. 007 How many unshared electrons and bonding electrons exist around the central atom in ozone, O 3 ? 1. four; four 2. two; two 3. zero; eight 4. none; two 5. four; three 6. two; six 7. three; six 8. one; six 9. one; three Brodbelt 820043 11:03, general, multiple choice, > 1 min, fixed.
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