Identify the alkyl halide that reacts the fastest in an SN2 reaction.()
A. 2-chloro-2-methylpropane
B. 2-chlorobutane
C. 1-chlorobutane
D. chloromethane
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Identify the best nucleophile in an SN2 reaction.()
A. isopropoxide ion
B. tert-butoxide ion
C. ethoxide ion
D. tert-pentoxide ion
The reagent needed to convert 2-butyne to cis-2-butene is ________.()
A. H2/Pt
B. H2/Lindlar's catalyst
C. H+/Zinc dust
D. Li/NH3
E. Na/NH3
Which of the following improperly describes the physical properties of an alkyne? ()
A. relatively nonpolar
B. nearly insoluble in water
C. less dense than water
D. insoluble in most organic solvents
Which of the following statements correctly describes the general reactivity of alkynes? ()
An alkyne is an electron-rich molecule and therefore reacts as a nucleophile.
B. The σ bonds of alkynes are higher in energy than the π bonds and are thus more reactive.
C. Unlike alkenes, alkynes fail to undergo electrophilic addition reactions.
D. Alkynes are generally more reactive than alkenes.
E. Alkynes react as electrophiles, whereas alkenes react as nucleophiles.
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