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Midterm 2005 - Chemistry 213a 2005 Midterm Code 111 Page 1...

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Chemistry 213a 2005 Midterm Code 111 Page 1 Before you start, please enter code 111 on your Scantron sheet 1. Which one of the following has a net dipole moment equal to zero ( i.e. which one is a non-polar molecule)? A) CH 3 OCH 3 B) CH 3 NH 2 C) CH 2 Cl 2 D) CH 3 CCH 3 O E) CO 2 2. Risperdal , shown below, is a medication for the treatment of bipolar mania. What are the hybridizations and approximate bond angles of the atoms indicated? O N N O F N N i iv iii ii i ii iii iv A) sp 2 sp 2 120° sp 2 B) sp 3 sp 2 120° sp 2 C) sp 3 sp 3 109° sp 3 D) sp 2 sp 3 109° sp 3 E) sp 2 sp 2 109° sp 3
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Chemistry 213a 2005 Midterm Code 111 Page 2 3. Which one of the following has no net charge? Assume all atoms have a full valence shell. CH 2 OH COO 4. Taking the starting materials and products into consideration, which one of A E shows the proper use of organic-chemistry arrow conventions? A) O H OH B) O O H O O H C) O H O H D) NH 2 H NH 2 H E) S O O O HO H S O O O HO H
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Chemistry 213a 2005 Midterm Code 111 Page 3 5. Which functional group is NOT present in the anti-malarial drug quinine? 6. The measured pKa values for three acids are shown below. Which one pKa value listed in A E is possible for the boxed molecule? COOH pKa = 4.8 COOH pKa = 4.5 Cl COOH pKa = 2.9 Cl COOH pKa = ? Cl HO O N N
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Chemistry 213a 2005 Midterm Code 111 Page 4 7. Which one of the following is the weakest acid? A) CH 3 CH CH 2 B) SH C) HC CH D) O OH E) OH
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