Organic Chemistry
Practice Test
1.
2.52 g of diatomic oxygen occupies 3.00 L at 266 K. What is the pressure of the oxygen?
a.
33.5 Pa
b.
58.0 kPa
c.
123 kPa
d.
42.0 kPa
2.
The water molecule is polar partly because of its _____________.
a.
volume
b.
weight
c.
geometry
d.
mass
3.
Covalent bonding results when this element reacts with fluorine.
a.
lithium
b.
potassium
c.
oxygen
d.
iron
4.
How many grams of NaCl are dissolved in 500.0 mL of a 0.05M solution of NaCl?
a.
2.92 g
b.
1.46 g
c.
0.05 g
d.
0.29 g
5.
The arrangement of electron pairs around each of the two carbon atoms in the ethene molecule, C
2
H
4
, is best described as _________________.
a.
trigonal planar
b.
square planar
c.
linear
d.
tetrahedral
6.
What type of organic compound is characterized by a hydroxy functional group bonded to a carbon atom of a hydrocarbon?
a.
octane
b.
carbon dioxide
c.
an aldehyde
d.
an alcohol
7.
______________ gives additional strength to a polymer.
a.
Ionic bonding
b.
Cross-linking
c.
Boiling
d.
Single bonding
8.
The arrangement of electron pairs around the nitrogen atom in the ammonia molecule, NH
3
, is best described as _______________.
a.
square planar
b.
tetrahedral
c.
linear
d.
pyramidal
9.
A large molecule made up of many smaller, repeating units is called a _____________.
a.
polymer
b.
wax
c.
ketone
d.
monomer
10.
Calculate the molarity of 0.75 L of a solution containing 0.83 g of dissolved KCl.
a.
0.015 M
b.
1.1 M
c.
6.2
d.
0.75 M
11.
This alkane has the formula C
10
H
22
.
a.
octane
b.
ethane
c.
pentane
d.
decane
12.
A system is said to be in ___________ when no net change in the amounts of reactants and products occurs.
a.
dislacement
b.
equilibrium
c.
reverse
d.
state
13.
In general, _________ are malleable and ductile.
a.
metals
b.
metalloids
c.
nonmetals
d.
noble gases
14.
A functional group is the part of a molecule having a specific arrangement of atoms that is largely responsible for the _______________ of the parent molecule.
a.
density
b.
mass
c.
chemical behavior
d.
volume
15.
What is the mass of 2.40 mol of copper?
a.
3.78 mg
b.
26.5 kg
c.
5.65 g
d.
152 g
16.
According to the equation 2HBr + Na
2
CO
3
NaBr + H
2
O + CO
2
, what volume of CO
2
at 1.230 atm and 325 K is produced by 50.0 g of HBr reacting with an excess of Na
2
CO
3
?
a.
22.4 L
b.
6.70 L
c.
50.0 L
d.
1.52 L
17.
The bond angle in the water molecule is about __________.
a.
180
o
b.
45
o
c.
105
o
d.
90
o
18.
How many moles of calcium are in 0.544 g of calcium?
a.
0.0773
b.
3.11
c.
0.554
d.
0.0136
19.
What is the shape of the benzene molecule?
a.
octahedral
b.
tetrahedral
c.
trigonal pyramidal
d.
hexagonal planar
20.
Adding reactants causes an equilbrium to ______________.
a.
shift to the right
b.
remain unchanged
c.
shift to the left
d.
shift in both directions simultaneously
