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1

Which reaction can not be used to prepare an alcohol?
A)addition of H3O+ to an alkene.
B)hydroboration of alkenes.
C)a Grignard reagent with an aldehyde.
D)reduction of acids.
E)oxidation of ethers.
2

Hydrogenation of a carbonyl group requires?
A)an acid catalyst.
B)a base catalyst.
C)high temperatures.
D)a metal catalyst.
E)high pressure.
3

Which statement about LiAlH4 is false?
A)it is a common reducing agent.
B)it is a source of hydride ions (H-).
C)they require the use of anhydrous solvents like ether.
D)it requires a second step, the addition of water or an alcohol, to protonate the oxide.
E)it is a weaker reducing agent than NaBH4.
4

LiAlH4 and NaBH4 are used to?
A)reduce carbonyl groups.
B)reduce alkenes.
C)reduce arenes.
D)all of the above.
E)none of the above.
5

Which statement about the reduction of acids or esters is false?
A)the product of the reaction is a 1o alcohol.
B)they are more difficult to reduce than aldehydes and ketones.
C)the reagent of choice is LiAlH4.
D)the reagent of choice is NaBH4.
E)the reaction is carried out in two steps.
6

Vicinal diols can be prepared by?
A)oxidizing alkanes with OsO4.
B)oxidizing alkenes with OsO4.
C)reducing alkanes with OsO4.
D)reducing alkenes with OsO4.
E)oxidizing alkynes with OsO4.
7

Ethers can be prepared from alcohols by?
A)a reductive addition.
B)an oxidative addition.
C)a nucleophilic substitution.
D)an electrophilic addition.
E)a condensation.
8

A Fisher esterification reaction?
A)involves the base catalyzed addition of an alcohol to a ketone.
B)involves the acid catalyzed addition of an alcohol to a ketone.
C)involves the base catalyzed addition of an alcohol to a acid.
D)involves the acid catalyzed addition of an alcohol to a acid.
E)involves the acid catalyzed addition of an alcohol to an aldehyde.
9

Which statement about Fisher esterification is false?
A)acyl halides are also reactive.
B)alcohol reactivity is methanol > primary > secondary > tertiary.
C)the stereochemistry of the alcohol is retain
D)acid anhydrides are also reactive.
E)the reaction is irreversible.
10

Alcohols are most commonly oxidized by?
A)chromic acid.
B)OsO4.
C)KMnO4.
D)metal catalysts.
E)H2PO4.
11

Periodic acid (HIO4) is used to?
A)oxidize aldehydes.
B)oxidize geminal diols.
C)oxidize vicinal diols.
D)oxidize ketones.
E)oxidize acid anhydrides.
12

Thiols are prepared by reacting alkyl halides with?
A)KSH
B)SO2
C)SO3
D)H2SO3
E)H2SO4
13

Which statement about S-H bonds in false?
A)they are weaker than O-H bonds.
B)they are weaker acids than alcohols.
C)they form weaker hydrogen bonds than O-H bonds.
D)only the sulfur atom can be oxidiz
E)one oxidative product is a disulfide.





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