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WorksheetsChemistry Exam Review
Total questions: 25
Worksheet time: 20mins
Name
Class
Date
1.
Ca + AlCl3 --> CaCl2 + Al
a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Double replacement
2.
C3H8 + O2 --> H2O + CO2
a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Combustion
3.
Mg + N2 --> Mg3N2
a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Combustion
4.
NO2 --> N2 + O2
a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Combustion
5.
Fe + H2SO4 --> Fe2(SO4)3 + H2
a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Combustion
6.
C3H6O + O2 --> CO2 + H2O
a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Combustion
7.
Balance this equation-
__P4 + __O2 --> __P2O3
__P4 + __O2 --> __P2O3
a)
it is already balanced
b)
2, 1, 3
c)
1, 2, 3
d)
1, 3, 2
8.
Balance this equation.
_CF4 + _Br2 -- _CBr4 + _F2
_CF4 + _Br2 -- _CBr4 + _F2
a)
2,1,2,1
b)
1,2,2,1
c)
1,2,1,2
d)
2,2,2,2
9.
Balance this equation
_N2 + _H2 --> _NH3
_N2 + _H2 --> _NH3
a)
1,2,3
b)
1,3,2
c)
1,1,2
d)
2,1,1
10.
Balance this equation.
_Mg + _Cl2 --> _MgCl2
_Mg + _Cl2 --> _MgCl2
a)
1, 2,1
b)
already balanced
c)
2,1,1
d)
1,1,2
11.
What is the arrow in a chemical equation...
H2 + O --> H2O
H2 + O --> H2O
a)
Reactants
b)
Products
c)
Yields
d)
Chemical Equation
12.
The starting substance in a chemical reaction is known as the ___.
a)
product
b)
catalyst
c)
reactant
d)
compound
13.
Which of the following is a diatomic element?
a)
Fluorine
b)
Carbon
c)
Sulfur
d)
Sodium
14.
The symbol Δ in a chemical equation means
a)
A catalyst is needed
b)
Heat is supplied to the reaction
c)
a precipitate
d)
yields
15.
A reaction in which two or more substances react to form a single substance
a)
combination
b)
combustion
c)
decomposition
d)
single replacement
16.
In a chemical reaction, the mass of the reactants
a)
is equal to the mass of the products
b)
is less than the mass of the products
c)
is more than the mass of the products
d)
has no relationship to the mass of the products
17.
A whole number that appears before a formula in an equation is known as the
a)
catalyst
b)
coefficient
c)
product
d)
subscript
18.
Oxygen is always a reactant in a ___ reaction
a)
single replacement
b)
combination
c)
combustion
d)
double replacement
19.
A catalyst
a)
speeds up a reaction
b)
one of the reactants in a single is a replacement reaction
c)
solid product of a reaction
d)
is a product of a combustion reaction
20.
A new substance formed in a chemical reaction
a)
reactants
b)
products
c)
coefficients
d)
spectator ions
21.
A reaction that involves an exchange of positive ions between two compounds
a)
Combination reaction
b)
Double-replacement reaction
c)
Single-replacement reaction
d)
Decomposition reaction
22.
When KF decomposes, the products are
a)
K + F
b)
K2 + F2
c)
K + F2
d)
None of the choices
23.
An equation in which each side has the same number of atoms of each element
a)
activity series
b)
skeleton equation
c)
balanced equation
d)
catalyst
24.
KOH + H3PO4 --> K3PO4 + H2O
a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Double replacement
25.
The symbol ↔ indicate?
a)
an incomplete reaction
b)
heat is applied
c)
the reaction is reversible
d)
gas is formed
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