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Test_2_Keys - INTRODUCTION TO ORGANIC CHEMISTRY II CHEM 224...

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INTRODUCTION TO ORGANIC CHEMISTRY II CHEM 224 UNIT EXAMINATION #2 STUDENT NAME (PRINT CLEARLY): . DO NOT OPEN THIS BOOKLET UNTIL YOU ARE INSTRUCTED TO BEGIN 1
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Chapter 18: Ketones and Aldehydes MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question (1 point each). 1) Which of the following correctly describes the bond angle and hybridizations present in formaldehyde? A) C, sp 2 ; O, sp 3 ; HCO, ~120 e B) C, sp 2 ; O, sp 2 ; HCO, ~120 e C) C, sp 2 ; O, sp 2 ; HCO, ~109.5 e D) C, sp 3 ; O, sp 2 ; HCO, ~109.5 e E) C, sp 3 ; O, sp 3 ; HCO, ~109.5 e Your answer: ___B _____ 2) Which of the following represents the correct ranking in terms of increasing boiling point? Your answer: ___E _____ 3) Which compound will show an intense peak in the mass spectrum at m/z 58? Your answer: ___A ____ 4) When a carbonyl is part of a conjugated p-network, the C h O stretch: Your answer: ___B ____ 5) In carbon NMR, the carbon atom of the carbonyl group in aldehydes and ketones has a chemical shift of about: A) 20 ppm. B) 40 ppm. C) 60 ppm. D) 120 ppm. E) 200 ppm. Your answer: ___E _____ 6) In the proton NMR spectra of aldehydes and ketones, the protons bonded to carbons adjacent to the carbonyl group typically fall into which of the chemical shift ranges below? Your answer: ___B _____ 2
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