Chemical Bonding
Practice Test
1.
These types of compounds make eggshells brittle.
a.
network
b.
covalent
c.
molecular
d.
ionic
2.
Green plants take in this gas and give off oxygen during photosynthesis.
a.
ammonia
b.
nitrogen
c.
hydrogen
d.
carbon dioxide
3.
The CO
2
molecule is _____________.
a.
linear
b.
hexagonal
c.
pyramidal
d.
trigonal planar
4.
The boiling point of methane, CH
4
, is ___________ than that of water.
a.
slightly higher
b.
much lower
c.
slightly higher
d.
much higher
5.
This type of chemical reaction has energy written as a product.
a.
energy-absorbing
b.
endothermic
c.
light-absorbing
d.
exothermic
6.
Which of these formulas does not represent a polyatomic ion?
a.
CN
-
b.
CO
c.
PO
4
3-
d.
NO
2
-
7.
The nucleus of this atom contains nine protons and nine neutrons.
a.
fluorine-18
b.
neon-18
c.
oxygen-18
d.
nitrogen-19
8.
The formulas O
2
, P
4
, and S
8
show that oxygen, phosphorus, and sulfur are _______________.
a.
molecular elements
b.
ionic elements
c.
diatomic
d.
hydrates
9.
What is the maximum number of electrons that can be present in each principal energy level of hydrogen?
a.
n
b.
2n 2
c.
2n
d.
n 2
10.
Reactions that can occur in either direction are said to be ____________.
a.
backward
b.
forward
c.
limited
d.
reversible
11.
Covalent bonding results when this element reacts with fluorine.
a.
potassium
b.
iron
c.
oxygen
d.
lithium
12.
Molten sodium chloride conducts electricity because ______________________.
a.
the ions are free to move
b.
chlorine gas escapes
c.
the chlorine atoms carry a charge
d.
solid sodium conducts, too
13.
The covalent compound commonly found in plastic, disposable lighters is __________.
a.
butane
b.
carbon monoxide
c.
water
d.
gasoline
14.
A chemical bond that results from a shared pool of valence electrons is called a ____________ bond.
a.
ionic
b.
polar covalent
c.
metallic
d.
directional
15.
Changes in an equilibrium system can be described according to _____________ principle.
a.
Dalton's
b.
Boyle's
c.
Rutherford's
d.
Le Chatelier's
16.
A description of a chemical reaction that includes the names of all reactants and products, but not the formulas, is called a ___________________.
a.
word equation
b.
skeleton equation
c.
balanced equation
d.
chemical equation
17.
How many single and double covalent bonds does a carbon atom have in a carbon dioxide molecule?
a.
one double bond and two single bonds
b.
two double bonds
c.
four single bonds
d.
two triple bonds
18.
A ____________ reaction is one in which a compound breaks down into two or more simpler substances.
a.
replacement
b.
synthesis
c.
photosynthesis
d.
decomposition
19.
What is the name of the molecular compound NO
2
?
a.
nitrogen dioxygen
b.
nitrogen dioxide
c.
nitrite
d.
dinitrogen dioxide
20.
What type of reaction is represented by the equation 2Fe + 3Cl
2
2FeCl
3
?
a.
decomposition
b.
single displacement
c.
synthesis
d.
combustion
