Organic Chemistry I

Professor Carl C. Wamser

Chapter 4 Pre-Quiz

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1. The hybridization of a carbocation such as CH3+ is

a. sp  
* b. sp2  
c. sp3  
d. unhybridized

2. The alcohol that is most reactive with HBr is

a. n-butyl alcohol  
b. sec-butyl alcohol  
c. isobutyl alcohol  
* d. tert-butyl alcohol  
e. all are equally reactive

3. A chain reaction is a characteristic feature of reactions involving

a. oxidation/reduction  
b. acid/base  
c. nucleophilic substitution  
d. carbocations  
* e. free radicals

4. Thionyl chloride is a reagent used to convert

a. an alkyl halide into an alcohol  
b. an alcohol into an alkyl bromide  
* c. an alcohol into an alkyl chloride  
d. an alcohol into an alkoxide  
e. an alkyl chloride into a thioester

5. In Figure 4.5, the red regions are intended to represent

* a. high negative charge  
b. high positive charge  
c. low negative charge  
d. low positive charge