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Return to Organic Chemistry 1e Student Resources
Chapter 7 Multiple Choice Questions
Quiz Content
*
not completed
.
Which of the following
cannot
react as a nucleophile?
CH
3
NH
2
correct
incorrect
(CH
3
)
2
NH
correct
incorrect
(CH
3
)
3
N
correct
incorrect
(CH
3
)
4
N
+
correct
incorrect
*
not completed
.
Which of the following
cannot
react as a nucleophile?
CH
3
OH
correct
incorrect
CH
3
O
-
correct
incorrect
CH
3
O
+
H
2
correct
incorrect
CH
3
OCH
3
correct
incorrect
*
not completed
.
Which of the following
cannot
react as a nucleophile?
H
2
C=CH
2
correct
incorrect
BH
3
correct
incorrect
H
2
C=NH
correct
incorrect
CH
3
CH
2
SH
correct
incorrect
*
not completed
.
Which of the following is
not
a typical electrophile?
Cl
2
correct
incorrect
HBr
correct
incorrect
(CH
3
)
4
N
+
correct
incorrect
Br
2
correct
incorrect
*
not completed
.
Which of the following reactions is an elimination?
correct
incorrect
correct
incorrect
correct
incorrect
correct
incorrect
*
not completed
.
Which of the following reactions is a substitution?
correct
incorrect
correct
incorrect
correct
incorrect
correct
incorrect
*
not completed
.
Which of the following reactions is an addition?
correct
incorrect
correct
incorrect
correct
incorrect
correct
incorrect
*
not completed
.
Which of the statements (a)-(d) about the reaction profile below is false?
The product is more stable than the reactant.
correct
incorrect
The first step is rate determining.
correct
incorrect
The reaction is exothermic.
correct
incorrect
The equilibrium constant is > 1 if the molar entropy change is negligible.
correct
incorrect
*
not completed
.
The following stepwise reactions comprise a mechanism for the acid-catalysed hydrolysis of an ester. Which step of (a)-(d) is an addition?
Step (a)
correct
incorrect
Step (b)
correct
incorrect
Step (c)
correct
incorrect
Step (d)
correct
incorrect
*
not completed
.
The following stepwise reactions comprise a mechanism for the acid-catalysed hydrolysis of an ester. Which step of (a)-(d) is an elimination?
Step (a)
correct
incorrect
Step (b)
correct
incorrect
Step (c)
correct
incorrect
Step (d)
correct
incorrect
*
not completed
.
Which of the following can react as a nucleophile?
(CH
3
)
3
B
correct
incorrect
(CH
3
)
3
CH
correct
incorrect
(CH
3
)
3
N
correct
incorrect
(CH
3
)
3
O
+
correct
incorrect
*
not completed
.
Which of the following does
not
normally react as a nucleophile?
(CH
3
)
2
O
correct
incorrect
(CH
3
)
2
OH
+
correct
incorrect
CH
3
CH
2
OH
correct
incorrect
CH
3
CH
2
O
-
correct
incorrect
*
not completed
.
Which of the following reacts most readily as an electrophile?
HBr
correct
incorrect
CH
3
Br
correct
incorrect
CH
3
OH
correct
incorrect
(CH
3
)
4
N
+
correct
incorrect
*
not completed
.
Which of the following normally reacts as an electrophile?
(CH
3
)
3
CH
correct
incorrect
H
2
C=CH
2
correct
incorrect
(CH
3
)
2
O
correct
incorrect
CH
3
Cl
correct
incorrect
*
not completed
.
Which of the following can react readily either as a nucleophile or as an electrophile?
(CH
3
)
3
B
correct
incorrect
(CH
3
)
2
O
correct
incorrect
CH
3
CO
2
H
correct
incorrect
H
2
C=CH
2
correct
incorrect
*
not completed
.
Which of the statements (a)-(d) about the following reaction profile is wrong?
The rate-determining step of this reaction is the first step.
correct
incorrect
This reaction is exothermic.
correct
incorrect
The product is less stable than the reactant.
correct
incorrect
Equilibrium is in favour of the reactant if the molar entropy change is negligible.
correct
incorrect
*
not completed
.
Which of the following statements is wrong?
The higher the energy of its HOMO, the more reactive a nucleophile will usually be.
correct
incorrect
The higher the energy of its LUMO, the more reactive an electrophile will usually be.
correct
incorrect
In an exothermic reaction, the enthalpy of the product(s) is lower than that of the reactant(s).
correct
incorrect
The equilibrium constant of an endergonic reaction is smaller than 1.
correct
incorrect
*
not completed
.
Which of the following statements is wrong?
It is not necessary for a nucleophile to have an unshared electron pair.
correct
incorrect
A species can react as an electrophile if it contains an atom (other than hydrogen) with an incomplete valence octet.
correct
incorrect
A species can react as an electrophile, even if it has one or more unshared electron pairs.
correct
incorrect
Any species bearing a lone pair can normally react as a nucleophile.
correct
incorrect
*
not completed
.
Where is the use of a curly arrow wrong in the following reaction sequence? Specify by (a)-(d).
Stage (a)
correct
incorrect
Stage (b)
correct
incorrect
Stage (c)
correct
incorrect
Stage (d)
correct
incorrect
*
not completed
.
Where is the use of a curly arrow wrong in the following reaction sequence? Specify by (a)-(d).
Stage (a)
correct
incorrect
Stage (b)
correct
incorrect
Stage (c)
correct
incorrect
Stage (d)
correct
incorrect
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