Hydrocarbons
Practice Test
1.
What is the molecular compound name for hydrazine, N
2
H
4
?
Number of atoms
Prefix
1
mono-
2
di-
3
tri-
a.
trinitrogen quatrohydride
b.
trinitrogen pentahydride
c.
dinitrogen tetrahydride
d.
dinitrogen hydride
2.
The structural formula -C=C- indicates a ___________ bond between the carbon atoms.
a.
double ionic
b.
single ionic
c.
single covalent
d.
double covalent
3.
A 0.001
M
solution of HCl is ____________.
a.
neutral
b.
a dilute acid solution
c.
a concentrated acid solution
d.
a weak acid solution
4.
Many simple molecules contain two lone pairs around the central atom. Which type of electron—to—electron repulsions are smallest in these molecules?
a.
All repulsions are equal.
b.
bonding pair to bonding pair
c.
lone pair to lone pair
d.
bonding pair to lone pair
5.
Substances that cause cancer are ______________.
a.
aliphatic
b.
substituted
c.
carcinogenic
d.
unsaturated
6.
Which of the following is not a conjugate acid-base pair?
a.
HCl and Cl
-
b.
H
3
O
+
and OH
-
c.
HNO
3
and NO
3
-
d.
H
2
O and OH
-
7.
What organic compound is characterized by the presence of a triple bond?
a.
alkyl halide
b.
alkane
c.
alkyne
d.
alkene
8.
How many lone pairs of electrons are present in a molecule of water?
a.
2
b.
3
c.
1
d.
4
9.
Compared to strong acids, weak acids produce __________ ions and conduct electricity __________ efficiently.
a.
fewer, less
b.
more, more
c.
more, less
d.
fewer, more
10.
What hybridization is present in an octahedral molecular geometry?
a.
sp
3d
b.
sp
3
c.
sp
3
d
2
d.
sp
2
11.
What is the principle use of alkanes?
a.
as antiseptics
b.
as polar solvents
c.
as fuels
d.
as flavorings
12.
What property can be assigned to a carbon atom that has four different atoms or structural groups attached to it?
a.
isomerity
b.
geometry
c.
chivalry
d.
chirality
13.
What type of organic compound has at least one double or triple bond?
a.
cyclic hydrocarbon
b.
saturated hydrocarbon
c.
alkane
d.
unsaturated hydrocarbon
14.
What is the formula for the binary compound of potassium and chlorine?
Binary Molecular Compound
Binary Acid
Contains only two different elements
Contains hydrogen and one other element
Second element uses name + -ide
Uses hydro + root of second element + -ic and acid
a.
KCl
2
b.
KCl
c.
K
2
ClO
3
d.
KHCl
15.
What is the name given to a series of compounds that differ from one another by a repeating unit?
a.
homologous series
b.
heterogeneous series
c.
homogeneous series
d.
hydrocarbon series
16.
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.
17.
Which of these is a product of the first step in the ionization of phosphoric acid, H
3
PO
4
?
a.
PO
4
b.
H
3
PO
4
c.
HPO
4
d.
H
2
PO
4
18.
To determine the number of bonding electron pairs, you must divide the number of electrons available for bonding by _______.
a.
2
b.
4
c.
1
d.
3
19.
The process used to separate fractions from petroleum is ___________.
a.
chirality
b.
fractional distillation
c.
drilling
d.
isomerization
20.
What is the prefix name that indicates when six carbon atoms are present in the alkane chain structure?
a.
hept
b.
oct
c.
hex
d.
pent
