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 Y o u r a n s w e r : _ _ _ B _____ 2) Which of the following represents the correct ranking in terms of increasing boiling point? A) n -pentane < 1-butanol < diethyl ether < 2-butanone B) n -pentane < 2-butanone < diethyl ether < 1-butanol C) 2-butanone < n -pentane < diethyl ether < 1-butanol D) n -pentane < diethyl ether < 1-butanol < 2-butanone E) n -pentane < diethyl ether < 2-butanone < 1-butanol Y o u r a n s w e r : _ _ _ E _____ 3) Which compound will show an intense peak in the mass spectrum at m/z 58? A) CH 3 COCH 2 CH 2 CH 3 B) (CH 3 ) 2 CHCOCH 3 C) CH 3 CH 2 COCH 2 CH 3 D) (CH 3 ) 3 CCHO E) (CH 3 ) 3 CCOCH 3 Y o u r a n s w e r : _ _ _ A ____ 4) When a carbonyl is part of a conjugated p-network, the C h O stretch: A) has a higher frequency than in a nonconjugated system. B) has a lower frequency than in a nonconjugated system.
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7) The proton NMR spectrum of an unknown compound contains a triplet at 9.8 ppm. Which of the following could be this unknown? A) (CH
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This note was uploaded on 04/07/2010 for the course ERRE 2324 taught by Professor Dsfdsf during the Spring '10 term at University of South Africa.

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

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