WorksheetsUnit 7 - Ch 8 C-D Test Review
Total questions: 21
Worksheet time: 11mins
Name
Class
Date
1.
Products always appear on the left side of chemical equation.
a)
TRUE
b)
FALSE
2.
(aq) denotes that a compound is:
a)
a liquid
b)
aqueous
c)
a solid
d)
a gas
3.
If a precipitate forms in a chemical reaction, it is denoted in a chemical formula with:
a)
→
b)
(aq)
c)
(s)
d)
(g)
4.
The activity series will tell us if a more active substance will replace a less active one
a)
False
b)
True
5.
An equation is balanced by adjusting the:
a)
oxidation numbers
b)
superscripts
c)
subscripts
d)
coefficients
6.
If a chemical reaction takes in energy, it is called:
a)
decomposition
b)
heated
c)
endothermic
d)
exothermic
7.
What reduces the energy needed to start a reaction without becoming involved in the reaction?
a)
activation energy
b)
catalyst
c)
endothermic energy
d)
exothermic energy
8.
Which is NOT evidence that a reaction has occurred?
a)
gas is produced
b)
heat is absorbed
c)
a precipitate forms
d)
a solution is made
9.
Ca and Cl react to form:
a)
CaCl2
b)
CaCl
c)
ClCa
d)
Ca2Cl
10.
The symbol Δ over the yields arrow means:
a)
the reaction will not occur
b)
a change occurs in the chemicals
c)
heat is released
d)
heat is added
11.
H2 + O2 → H2O
This reaction would be classified as:
This reaction would be classified as:
a)
synthesis
b)
decomposition
c)
single replacement
d)
double replacement
12.
NaCl → Na + Cl is classified as what type of reaction?
a)
synthesis
b)
decomposition
c)
single replacement
d)
double replacement
13.
2Al + 3CuSO4 → Al2(SO4)3 + 3Cu
This reaction is classified as what type of reaction?
This reaction is classified as what type of reaction?
a)
synthesis
b)
decomposition
c)
single replacement
d)
double replacement
14.
FeCl3 + 3KOH → Fe(OH)3 + 3KCl
This reaction is classified as which type of reaction?
This reaction is classified as which type of reaction?
a)
synthesis
b)
decomposition
c)
single replacement
d)
double replacement
15.
A balanced equation gives the elements involved in the chemical reaction and the mass of products made.
a)
True
b)
False
16.
What is the oxidation number of Mg in Mg(NO3)2 ?
a)
1+
b)
1-
c)
2+
d)
2-
17.
Polymers are composed of subunits called:
a)
dimers
b)
amino acids
c)
monomers
d)
nucleotides
18.
Which is NOT a driving force determining is a double replacement reaction will occur?
a)
water is formed
b)
a gas is formed
c)
a precipitate is formed
d)
an acid is formed
19.
Given 4Na (s) + O2 (g) → 2Na2O how many moles of oxygen will react with 6.8 moles of sodium?
a)
27.2 moles
b)
3.4 moles
c)
1.7 moles
d)
6.8 moles
20.
Which are the spectator ions of the following equation?
Zn(NO3)2 + Ba(OH)2 → Zn(OH)2 + Ba(NO3)2
Zn(NO3)2 + Ba(OH)2 → Zn(OH)2 + Ba(NO3)2
a)
Ba2+ and NO31-
b)
Zn2+ and OH1-
c)
Ba2+ and OH1-
d)
Zn2+ and NO31-
21.
The activation energy is the energy needed to get a reaction started.
a)
True
b)
False
100 %
