WorksheetsBasics of Chemical Reactions
Total questions: 19
Worksheet time: 15mins
Name
Class
Date
1.
HgO --> Hg + O2
a)
Synthesis
b)
Decomposition
c)
Single
d)
Combustion
2.
Mg + HCl --> MgCl2 + H2
a)
Single Displacement
b)
Double
c)
Combustion
d)
Synthesis
3.
Zn + H2SO4 --> ZnSO4 + H2
a)
Combustion
b)
Single Displacement
c)
Double
d)
Decomposition
4.
H2 + O2 --> H2O
a)
Decomposition
b)
Synthesis
c)
Combustion
d)
Single
5.
C6H12 + 9O2 --> 6CO2 + 6H2O
a)
Synthesis
b)
Single Displacement
c)
Combustion
d)
Decomposition
6.
What coffecients would balance the following chemical equation:
P + O2 → P4O10
P + O2 → P4O10
a)
1, 1, 1
b)
1, 2, 1
c)
4, 5, 1
d)
3, 2, 4
7.
What coffecients would balance the following chemical equation:
Al2O3 → Al + O2
Al2O3 → Al + O2
a)
1, 1, 1
b)
1, 2, 1
c)
4, 5, 1
d)
2, 1, 3
8.
When balancing equations a ____ can be placed to the left of a formula of a substance to make the equations balanced
a)
charge
b)
subscript
c)
random number
d)
coefficient
9.
Which of the following is evidence of a chemical reaction?
a)
a solid producing bubbles
b)
water changing to ice
c)
saltwater
d)
paper being cut in half
10.
The substances at the beginning of a chemical reaction are called the ____
a)
product
b)
yield
c)
chemical symbol
d)
reactants
11.
What is the part of the chemical equation in green called?
Fe + S --> FeS
Fe + S --> FeS
a)
products
b)
reactants
c)
yield
d)
chemical formula
12.
How many atoms of aluminum are on each side of the following equation: 4Al + 3O2 --> 2Al2 O3
a)
2
b)
6
c)
1
d)
4
13.
Some clues of a chemical change include..
a)
Melting, Breaking, Crushing
b)
Bending,Boiling, Foaming
c)
Evaporating, Cutting, production of heat
d)
Fizzing, Foaming, Change in color
14.
How many atoms are there TOTAL in:
H2SO4
H2SO4
a)
6
b)
5
c)
7
d)
3
15.
The reactants are on the left side of the chemical equation.
a)
True
b)
False
16.
In the reaction above water is a ________________.
a)
Reactant
b)
Product
17.
Si + S8 →Si2S4
a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Double replacement
18.
This pictures simulates what type of reaction?
a)
Synthesis
b)
Decomposition
c)
Single Replacement
d)
Double Replacement
19.
The red numbers in the image below represent ________
a)
subscripts
b)
coefficients
c)
I don't know, and don't want to try
d)
None of the answers are correct
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