Chem 212 - Organic Chem for Science Majors » Summer 2021 » Midterm Exam 1
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Question #1
Which reagent can convert alcohol into ester?
A.
Ether
B.
Haloalkane
C.
Aldehyde
D.
Carboxylic Acid
Question #2
A general method for preparing epoxy is the
A.
Hydration of alkenes
B.
Combustion of alkene
C.
Williamson's synthesis
D.
Oxidation of alkene
Question #3
Intermolecular dehydration of an alcohol produces a(n)
A.
Alkene
B.
Ether
C.
Thiol
D.
Alkyne
Question #4
2-Propanol on oxidation produces
A.
Diethylether
B.
Propanone
C.
Propene
D.
Propanal
Question #5
All of the following general formulas except one represent an ether. The exception is
A.
R–O–H
B.
R–O–R
C.
Ar–O–Ar
D.
Ar-O-R
Question #6
What is the IUPAC name for the ether whose common name is ethyl propyl ether?
A.
1-ethoxypropane
B.
1-propoxyethane
C.
2-propoxyethane
D.
2-ethoxypropane
Question #7
Which of the following molecules contains both an alkoxy group and a hydroxy group?
A.
CH3-O-CH2-O-CH3
B.
CH3-O-CH2-O-H
C.
CH3-OH
D.
CH3-O-CH3
Question #8
Which of the following is an incorrect IUPAC name for a phenol derivative?
A.
2,4-dibromophenol
B.
2-Chlorophenol
C.
3-methylphenol
D.
1-chlorophenol
Question #9
Ethers may be viewed as derivatives of water in which both hydrogen atoms have been replaced with
A.
Alkyl groups
B.
Alkyl and hydroxyl groups
C.
Aloxygroups
D.
Hydroxyl groups
Question #10
Phenol can be obtained by ________ of sodium phenoxide.
A.
Hydrogenation of aromatic ketone
B.
acidification
C.
Nitration
D.
Oxidation
Question #11
Which of the following has the highest boiling point?
A.
Butan-1-ol
B.
Propan-1-ol
C.
Ethanol
D.
Pentan-1-ol
Question #12
Phenol is less acidic than
A.
Ethanol
B.
acetic acid
C.
p-nitrophenol
D.
p-methylphenol
Question #13
CH3CH2OH can be converted into CH3CHO by ______________.
A.
treatment with pyridinium chlorochromate
B.
treatment with LiAlH4
C.
treatment with KMnO4
D.
catalytic hydrogenation
Question #14
Which are the initial main products of the reaction of t-butyl ethyl ether in hydrochloric acid?
A.
(CH3)3CCl + CH3CH2OH
B.
(CH3)3COH + CH3CH2Cl
C.
(CH3)3COH + CH3CH2OH
D.
(CH3)3CCl+ CH3CH2Cl
Question #15
The boiling point of ethyl alcohol is much higher than that of dimethyl ether though both have the same molecular weight. Why?
A.
Dipole moment of ethyl alcohol is less
B.
Ethyl alcohol shows hydrogen bonding
C.
Methyl groups are attached to oxygen in ether
D.
Ether is insoluble in water
Question #16
Which statement about diethyl ether, Et2O, is incorrect?
A.
Et2O can form hydrogen bonds with H2O.
B.
Et2O is polar.
C.
In neat Et2O, intermolecular hydrogen bonds are formed.
D.
Et2O is a volatile liquid at 298 K.
Question #17
In a Williamson's synthesis of tBuOMe, which would be the best starting materials to use?
A.
MeOH and tBuCl.
B.
tBuOH and MeCl.
C.
KOtBu and MeCl.
D.
KOMe and tBuCl.
Question #18
We can react alkene with acid to produce epoxides. Which of the following acids is suitable for this purpose?
A.
Sulfuric acid, H2SO4
B.
Hydrochloric acid, HCl
C.
Acetic acid, CH3COOH
D.
Meta-chlorobenzoic acid
Question #19
Thioethers are generally prepared by reacting
A.
Ethanol + S
B.
Esther + S
C.
Ether + H2S
D.
Ethanol_H2S
Question #20
Product of ozonolysis of ethene when reacts with HCN and result is hydrolyzed, a new product is obtained called
A.
Ethanoic acid
B.
2-Hydroxyethanoic acid
C.
2-Ketoethanoic acid
D.
Ethandioic acid
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