Chapters 7 and 8 Test Answers – Flashcards

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question
What two atomic orbitals or hybrid atomic orbitals overlap to form the C-C ? bond in ethylene?
answer
C p + C p
question
Rearrangements are likely to occur in which of the following reaction types?
answer
Both SN1 and E1 reactions
question
Using Zaitsev's rule, choose the most stable alkene among the following.
answer
1,2-dimethylcyclohexene
question
Which statement(s) is/are true of acid-catalyzed alcohol dehydrations?
answer
All 4 of the other choices
question
Regarding the use of potassium tert-butoxide as a base in E2 reactions, it is incorrect to state that:
answer
it will form, predominantly, the more stable alkene.
question
Carbon-carbon single bonds tend to be __________ and __________ than carbon-carbon double bonds.
answer
longer, weaker
question
Carbocations are frequent intermediates in acidic reactions of alkenes, alcohols, etc. What do carbocations usually do? They may:
answer
do all the choices
question
How many elements of unsaturation are implied by the molecular formula C6H12?
answer
1
question
How many elements of unsaturation are implied by the molecular formula c5h8O?
answer
2
question
Which of the alkyl chlorides listed below undergoes dehydrohalogenation in the presence of a strong base to give pent-2-ene as the only alkene product?
answer
3-chloropentane
question
What two atomic orbitals or hybrid atomic orbitals overlap to form the C-H bond in ethylene?
answer
C sp2 + H s
question
In the group shown below, which of the following alcohols is (are) likely to yield a product where skeletal rearrangement has occurred when treated with sulfuric acid? 3-methyl-3-pentanol, 3,3-dimethyl-2-butanol, 2,2-dimethylcyclohexanol
answer
both 3,3-dimethyl-2-butanol and 2,2-dimethylcyclohexanol
question
Which of the following alkenes has the smallest molar heat of hydrogenation (ie, releases the least heat upon hydrogenation)?
answer
2,3-dimethyl-2-butene
question
Which of the following alkenes has the largest molar heat of hydrogenation (ie, releases the most heat upon hydrogenation)?
answer
1-hexene
question
What two atomic orbitals or hybrid atomic orbitals overlap to form the C-C ? bond in ethylene?
answer
C sp2 + C sp2
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