题目内容

Identify the true statements in the mechanism in the addition of water to an alkene. ()

A. The addition of the electrophile is a slow step.
B. The addition of the nucleophile is a fast step.
C. A carbocation is formed as an intermediate.
D. Water abstracts the extra proton from the protonated alcohol.
E. All of the above

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Give the product for the reaction of 1-butene with methanol in the presence of acid. The mechanism is the same as the mechanism for the addition of water to alkenes. ()

A. 1-ethoxybutane
B. 2-ethoxybutane
C. 1-methoxybutane
D. 2-methoxybutane
E. 1-butanol

How many isomers with a molecular formula of C5H8 contain a terminal alkyne? ()

A. 1
B. 2
C. 3
D. 4
E. 5

How many isomers with a molecular formula of C6H10 contain an internal alkyne? ()

A. 1
B. 2
C. 3
D. 4
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A. p—p C) sp2—sp2
B. s—s
C. sp—sp