Hydrocarbons
Practice Test
1.
What organic compound is characterized by the presence of a triple bond?
a.
alkene
b.
alkyl halide
c.
alkyne
d.
alkane
2.
Compounds that are composed of the same number and type of atoms but have them arranged in different ways are ___________.
a.
polymers
b.
isomers
c.
alkanes
d.
isotopes
3.
The smallest cycloalkane has __________ carbon atoms.
a.
six
b.
three
c.
two
d.
one
4.
What element is combined with carbon to form the simplest organic compounds, also known as hydrocarbons?
a.
lipids
b.
hydrogen
c.
alcohols
d.
nucleic acids
5.
The structural formula -C=C- indicates a ___________ bond between the carbon atoms.
a.
single covalent
b.
double ionic
c.
single ionic
d.
double covalent
6.
How do structural isomers differ from stereoisomers?
a.
Stereoisomers have different chemical and physical properties; structural isomers have the same chemical and physical propeties.
b.
Structural isomers' atoms are bonded in different orders; stereoisomers' atoms are bonded in the same order.
c.
Structural isomers have different formulas; stereoisomers have the same formula.
d.
Structural isomers' atoms are bonded in the same order; stereoisomers' atoms are bonded in different orders.
7.
What physical structure must be present to have geometric isomers, also known as cis— and trans— isomers?
a.
single bond
b.
double bond
c.
triple bond
d.
cyclic structure
8.
What kind of organic compounds contain benzene rings as part of their structure?
a.
aromatic compounds
b.
alkalinic compounds
c.
adiabatic compounds
d.
aliphatic compounds
9.
The process used to separate fractions from petroleum is ___________.
a.
drilling
b.
chirality
c.
isomerization
d.
fractional distillation
10.
What type of organic compound has at least one double or triple bond?
a.
alkane
b.
cyclic hydrocarbon
c.
saturated hydrocarbon
d.
unsaturated hydrocarbon
11.
The branch of chemistry that is devoted to the study of carbon compounds is _________.
a.
physical chemistry
b.
organic chemistry
c.
analytical chemistry
d.
inorganic chemistry
12.
The side chain on an alkane that appears to replace a hydrogen on the straight chain is a _________________.
a.
substituent chain
b.
longest chain
c.
cross-linked chain
d.
parent chain
13.
What is the identifying structural feature of alkenes?
a.
single bonds
b.
triple bond
c.
double bond
d.
attachment of a halogen
14.
What is the principle use of alkanes?
a.
as antiseptics
b.
as fuels
c.
as polar solvents
d.
as flavorings
15.
Substances that cause cancer are ______________.
a.
substituted
b.
unsaturated
c.
aliphatic
d.
carcinogenic
16.
What term is used to describe isomers that have all the atoms bonded in the same order but arranged differently in space?
a.
stereoisomers
b.
polymers
c.
nonisomers
d.
structural isomers
17.
What property can be assigned to a carbon atom that has four different atoms or structural groups attached to it?
a.
chivalry
b.
chirality
c.
isomerity
d.
geometry
18.
What is the class of hydrocarbons that only have single bonds?
a.
alkenes
b.
alkynes
c.
alkylhalides
d.
alkanes
19.
What is the main source of hydrocarbons?
a.
waste products
b.
combustion
c.
grains
d.
petroleum
20.
What is the name given to a series of compounds that differ from one another by a repeating unit?
a.
homologous series
b.
hydrocarbon series
c.
homogeneous series
d.
heterogeneous series
21.
What is the name given to a hydrocarbon that contains a ring?
a.
branched-chain hydrocarbon
b.
straight-chain hydrocarbon
c.
unsaturated hydrocarbon
d.
cyclic hydrocarbon
22.
In fractional distillation the hydrocarbons composed of fewer carbon atoms rise up the colam in the form of a _______________.
a.
solid
b.
distillate
c.
gas
d.
liquid
