Hydrocarbon Compounds 5/17/11
HYDROCARBON COMPOUNDS 5/17/11
- 1.
What is organic chemistry?
- A.
It is the study of the chemistry of oxygen compounds
- B.
It is the study of the chemistry of carbon compounds.
- C.
It is the study of the chemistry of hydrogen compounds.
Correct Answer
B. It is the study of the chemistry of carbon compounds. -
- 2.
Organic compounds that contain only carbon and hydrogen are called
- A.
Hydroxcide
- B.
Carbonoxcide
- C.
Hydrocarbons
Correct Answer
C. Hydrocarbons -
- 3.
Alkanes contain only _____________ covalent bonds.
- A.
Single
- B.
Two
- C.
Three
Correct Answer
A. Single -
- 4.
What is the simplest alkane?
- A.
Hydrogen
- B.
Carbon
- C.
Methane
Correct Answer
C. Methane -
- 5.
Which 2 statements are true about carbon’s ability to form bonds.?
- A.
Carbon atoms have four valence electrons. Carbon atoms can form stable bonds with each other.
- B.
Carbon atoms always form three covalent bonds. Carbon atoms can form stable bonds with each other.
- C.
Carbon atoms always form three covalent bonds. Carbon atoms can form stable bonds with each other.
Correct Answer
A. Carbon atoms have four valence electrons. Carbon atoms can form stable bonds with each other. -
- 6.
What are straight-chain alkanes?
- A.
They contain any number of carbon atoms in a chain bonded together by single covalent bonds. The remaining valence electrons are bonded to carbon atoms.
- B.
They contain any number of carbon atoms in a chain bonded together by single covalent bonds. The remaining valence electrons are bonded to oxygen atoms.
- C.
They contain any number of carbon atoms in a chain bonded together by single covalent bonds. The remaining valence electrons are bonded to hydrogen atoms.
Correct Answer
C. They contain any number of carbon atoms in a chain bonded together by single covalent bonds. The remaining valence electrons are bonded to hydrogen atoms. -
- 7.
The names of all alkanes end with the suffix ______________________ .
- A.
-kan
- B.
Alk
- C.
-ane
Correct Answer
C. -ane -
- 8.
Nonane has
- A.
Has 9 carbon atoms
- B.
Has 7 carbon atoms
- C.
Has 4 carbon atoms
Correct Answer
A. Has 9 carbon atoms -
- 9.
propane
- A.
Has 8 carbon atoms
- B.
Has 4 carbon atoms
- C.
Has 3 carbon atoms
Correct Answer
C. Has 3 carbon atoms -
- 10.
heptane
- A.
Has10 carbon atoms
- B.
Has 5 carbon atoms
- C.
Has 7 carbon atoms
Correct Answer
C. Has 7 carbon atoms -
- 11.
butane
- A.
Has 1 carbon atoms
- B.
Has 4 carbon atoms
- C.
Has 2 carbon atoms
Correct Answer
B. Has 4 carbon atoms -
- 12.
The straight-chain alkanes are a(n) ______________________________ because there is an incremental change of —CH2— from one compound in the series to the next.
- A.
Homologous series
- B.
Heterogous series
- C.
Mologous series
Correct Answer
A. Homologous series -
- 13.
CH3CH2CH2CH2CH3 CH3(CH2)3CH3 C — C — C — C — C
- A.
Formula for carbon
- B.
Formula for methane
- C.
Formula for pentane
Correct Answer
C. Formula for pentane -
- 14.
The ______________________ system names organic compounds according to their structure.
- A.
UPIAC
- B.
PACIU
- C.
IUPAC
Correct Answer
C. IUPAC -
- 15.
A(n) ______________________ is an atom or group of atoms that replaces hydrogen in a hydrocarbon.
- A.
Substituent
- B.
Emerged
- C.
Not substituent
Correct Answer
A. Substituent -
- 16.
Alkyl groups are named by removing the-ane ending of the parent hydrocarbon and adding ______________________ to indicate that one ______________________ has been removed.
- A.
Ly, radon
- B.
Ing, oxygen
- C.
-yl ,hydrogen
Correct Answer
C. -yl ,hydrogen -
- 17.
What is a branched-chain alkane?
- A.
It is an alkane with one or more alkyl groups.
- B.
It is an alkane with two or more alkyl groups
- C.
It is an alkane with three or more alkyl groups
Correct Answer
A. It is an alkane with one or more alkyl groups. -
- 18.
Why are hydrocarbon molecules such as alkanes nonpolar?
- A.
Hydrocarbon molecules such as alkanes are nonpolar because the electron pair in a carbon–hydrogen or a carbon–carbon bond is shared equally by the nuclei of the atoms involved.
- B.
Water molecules such as alkanes are nonpolar because the electron pair in a carbon–hydrogen or a carbon–carbon bond is shared equally by the nuclei of the atoms involved.
- C.
Carbon molecules such as alkanes are nonpolar because the electron pair in a carbon–hydrogen or a carbon–carbon bond is shared equally by the nuclei of the atoms involved.
Correct Answer
A. Hydrocarbon molecules such as alkanes are nonpolar because the electron pair in a carbon–hydrogen or a carbon–carbon bond is shared equally by the nuclei of the atoms involved. -
- 19.
Hydrocarbons and other nonpolar molecules are not attracted to
- A.
Radon
- B.
Water
- C.
Oxygen
Correct Answer
B. Water -
- 20.
What is an alkene?
- A.
It is a hydrowater containing one or more carbon–carbon double covalent bonds.
- B.
It is a carbon containing one or more carbon–carbon double covalent bonds.
- C.
It is a hydrocarbon containing one or more carbon–carbon double covalent bonds.
Correct Answer
C. It is a hydrocarbon containing one or more carbon–carbon double covalent bonds. -
- 21.
Organic compounds that contain fewer than the maximum number of hydrogens in their structures are called ______________________ compounds.
- A.
Unsaturated
- B.
Saturated
- C.
Multisaturated
Correct Answer
A. Unsaturated -
- 22.
Which family of hydrocarbons are always saturated compounds?
- A.
Hydrocarbon
- B.
Alkanes
- C.
Ethyne
Correct Answer
B. Alkanes -
- 23.
Hydrocarbons that contain one or more ______________________ covalent bonds between carbons are called alkynes.
- A.
Four
- B.
Double
- C.
Triple
Correct Answer
C. Triple -
- 24.
______________________ is the simplest alkyne, and is also known by the common name ______________________ . common name ______________________ .
- A.
Ethyne, acetylene
- B.
Hydrocarbons,acetylene
- C.
Ethyne,Hydrocarbons
Correct Answer
A. Ethyne, acetylene -
- 25.
What are the major attractive forces between alkane, alkene, or alkyne molecules? What physical properties can be explained by these forces?
- A.
The major forces are semi - weak van der Waals forces. As a result, many of these compounds have very low boiling points, and are gases at room temperature.
- B.
The major forces are strong van der Waals forces. As a result, many of these compounds have very low boiling points, and are gases at room temperature.
- C.
The major forces are weak van der Waals forces. As a result, many of these compounds have very low boiling points, and are gases at room temperature.
Correct Answer
C. The major forces are weak van der Waals forces. As a result, many of these compounds have very low boiling points, and are gases at room temperature. -
- 26.
What are structural isomers?
- A.
They are compounds that have the same molecular formula but same molecular structures.
- B.
They are compounds that have the different molecular formula but different molecular structures.
- C.
They are compounds that have the same molecular formula but different molecular structures.
Correct Answer
C. They are compounds that have the same molecular formula but different molecular structures. -
- 27.
Structural isomers have the ____________ physical properties.
- A.
Multiple
- B.
Same
- C.
Different
Correct Answer
B. Same -
- 28.
How many structural isomers are there for C4H10?
- A.
2
- B.
3
- C.
4
Correct Answer
A. 2 -
- 29.
Name the structural isomers of C4H10.
- A.
1-hexyne and 2-methylpropane
- B.
Heptane and 3 octane
- C.
Butane and 2-methylpropane
Correct Answer
C. Butane and 2-methylpropane -
- 30.
In general, what determines which structural isomer will have the lowest boiling point?
- A.
In general, the more highly branched structure will have the lowest boiling point.
- B.
In general, the more highly branched structure will have the highest boiling point.
- C.
In general, the more highly branched structure will have the medium boiling point.
Correct Answer
A. In general, the more highly branched structure will have the lowest boiling point. -
- 31.
Molecules that differ only in the spatial configuration of their substituted groups are called ______________________ isomers.
- A.
Numerical
- B.
Geometric
- C.
Figure
Correct Answer
B. Geometric -
- 32.
a double bond and at least one substituent on each carbon of the double bond
- A.
Two things need to be present for the type of hydrocarbons
- B.
Two things need to be present for the type of isomerism
- C.
Two things need to be present for the type of molecules
Correct Answer
B. Two things need to be present for the type of isomerism -
- 33.
______________________ is the simplest alkyne, and is also known by the common name ______________________ . common name ______________________ .
- A.
Dimethyl, pentene
- B.
Acetylene, ethyne
- C.
Ethyne,acetylene
Correct Answer
C. Ethyne,acetylene -
- 34.
What are the major attractive forces between alkane, alkene, or alkyne molecules? What physical properties can be explained by these forces?
- A.
The major forces are weak van der Waals forces. As a result, many of these compounds have very high boiling points, and are gases at room temperature.
- B.
The major forces are weak van der Waals forces. As a result, many of these compounds have very low boiling points, and are gases at room temperature.
- C.
The major forces are weak van der Waals forces. As a result, many of these mixture have very low boiling points, and are gases at room temperature.
Correct Answer
B. The major forces are weak van der Waals forces. As a result, many of these compounds have very low boiling points, and are gases at room temperature. -
- 35.
What are structural isomers?
- A.
They are compounds that have the different molecular formula but different molecular structures.
- B.
They are mixtures that have the same molecular formula but different molecular structures.
- C.
They are compounds that have the same molecular formula but different molecular structures.
Correct Answer
C. They are compounds that have the same molecular formula but different molecular structures. -
- 36.
Structural isomers have the _____________physical properties.
- A.
Same
- B.
Diflerent
- C.
Multiple
Correct Answer
B. Diflerent -
- 37.
How many structural isomers are there for C4H10?
- A.
2
- B.
5
- C.
3
Correct Answer
A. 2 -
- 38.
Name the structural isomers of C4H10.
- A.
Heptane and 2-methylpropane
- B.
Butane and 2-methylpropane
- C.
Octane and 2-methylpropane
Correct Answer
B. Butane and 2-methylpropane -
- 39.
In general, what determines which structural isomer will have the lowest boiling point?
- A.
In general, the more highly branched structure will have the lowest boiling point.
- B.
In general, the more highly branched structure will have the highest boiling point.
- C.
In general, the more highly branched structure will have the medium boiling point.
Correct Answer
A. In general, the more highly branched structure will have the lowest boiling point. -
- 40.
Molecules that differ only in the spatial configuration of their substituted groups are called ______________________ isomers.
- A.
Geometric
- B.
Number
- C.
Alphabet
Correct Answer
A. Geometric -
- 41.
a double bond and at least one substituent on each carbon of the double bond
- A.
Two things need to be present for the type of electrons
- B.
Two things need to be present for the type of atoms
- C.
Two things need to be present for the type of isomerism
Correct Answer
C. Two things need to be present for the type of isomerism -
- 42.
______________________ objects will produce a reflection that is indistinguishable from the original.
- A.
Multi-Symmetrical
- B.
Symmetrical
- C.
Non-Symmetrical
Correct Answer
B. Symmetrical -
- 43.
Mirror images that cannot be placed on top of each other to form a matching pair are called __________________________
- A.
Nonsuperimposable
- B.
Superimposable
- C.
Imposable
Correct Answer
A. Nonsuperimposable -
- 44.
What is an asymmetric carbon?
- A.
It is a carbon with three different groups attached to it.
- B.
It is a carbon with five different groups attached to it.
- C.
It is a carbon with four different groups attached to it.
Correct Answer
C. It is a carbon with four different groups attached to it. -
- 45.
Molecules that have an asymmetric ________ have handedness.
- A.
Carbon
- B.
Water
- C.
Oxygen
Correct Answer
A. Carbon -
- 46.
Why are these two molecules stereoisomers?
- A.
They have the same molecular structure but differ in the arrangement of the atoms in space.
- B.
They have the same molecular structure but differ in the arrangement of the protonsin space.
- C.
They have the same molecular structure but differ in the arrangement of the electrons in space.
Correct Answer
A. They have the same molecular structure but differ in the arrangement of the atoms in space. -
- 47.
What is a cyclic hydrocarbon?
- A.
It is a compound that contains a carbon ring.
- B.
It is a mixture that contains a hydrocarbon ring.
- C.
It is a compound that contains a hydrocarbon ring.
Correct Answer
C. It is a compound that contains a hydrocarbon ring. -
- 48.
The most abundant cyclic hydrocarbons contain ______________________ or ______________________ carbons.
- A.
5, 6
- B.
3, 5
- C.
2, 7
Correct Answer
A. 5, 6 -
- 49.
Cyclic hydrocarbons that contain only single carbon–carbon bonds are called ___________________.
- A.
Alkanes
- B.
Cycloalkanes
- C.
Cycloxygen
Correct Answer
B. Cycloalkanes -
- 50.
______________________ are a special group of unsaturated cyclic hydrocarbons.
- A.
Aromatic
- B.
Benzene
- C.
Arenes
Correct Answer
C. Arenes -
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