Quiz 1 Key

Quiz 1 Key - Dr. Manashi Chatterjee Winter 2008 — Chem...

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Unformatted text preview: Dr. Manashi Chatterjee Winter 2008 — Chem 30A I l Signature I Name of your TA: (Please Circle) Total: Discussion Section — Day : / Chem 30 A Winter 2008 Quiz # 1 (15 mins) Wednesday January 16, 2008 Electronegativity values for some atoms (Pauling scale) DO NOT OPEN THIS EXAM UNTIL INSTRUCTED TO DO SO Dr. Manashi Chatterjee Winter 2008 — Chem 30A Quiz # 1 1. Which of the following compounds is a carboxylic ester? (3 points) Answer is: g i 2. What is the hybridization of the Carbon attached to the Oxygen in CH3CH20H? ’5 Answer is: (j 2 __ 3. Which of the following is a tertiary (3°) alcohol? a. b. CH3CH2COOH C. CH3CH2COCH3 d. CH3CH2COOCH3 (2 points) (3 points) a. (CH3)2CHOH b. CH3CH2CH20H c. (CH3)3COH C d. (CH3)3COCH3 Answer is: ’ 4. Which of the following bonds is the most polar? (2 points) a. C-H b. C-Si c. F-F \ d. H—F Answer is: C 5. Rank the following in order of decreasing importance as a contributing resonance structure to the molecular structure of acetone, CH3COCH3 (more important > less important). (3 points) {-3} 9 .. Tl)‘ IO? 30'. *3. {39 C ' C C H30/ “CH3 H30” \CH3 H30” \CH3 1 2 3 a l>2>3 b72>1>3 r c. l > 3 > 2 d./ 3 > 2 > 1 Answer is: Dr. Manashi Chatterjee I Winter 2008 - Chem 30A Quiz # I 6. Draw 2 reasonable resonance structures for the molecule shown below. Show curved arrows on each structure that is required to convert each resonance form into the other. Include all formal chargeflsanfilone pairs as appropriate. (6 points) 7. Draw 2 reasonable resonance structures for the molecule shown below. Show curved arrows on each structure that is required to convert each resonance form into the other. Include all formal charges and lone pairs as appropriate. (6 points) a?“ Strudmfe \\ oi: CMTCLQ 3 (M ® -\34( QQCM VB \0 Wm\ ...
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Quiz 1 Key - Dr. Manashi Chatterjee Winter 2008 — Chem...

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