WorksheetsTypes of chemical reactions and balancing chemical equations
Total questions: 30
Worksheet time: 23mins
Name
Class
Date
1.
What are Chemical Reactions?
a)
It's when you mix substances.
b)
a process in which atoms rearrange to form new substances
c)
When something bubbles.
d)
letter and numbers showing the types and number of atoms
2.
the starting materials in a chemical reaction
a)
Products
b)
Reactants
c)
Starters
d)
Enders
3.
a substance that is formed as the result of a chemical reaction
a)
Product
b)
Reactant
c)
Starters
d)
Enders
4.
In the following reaction, what sign is there that a precipitation reaction took place?
AgNO3 (aq) + NaOH (aq) → AgOH (s) + NaNO3 (aq)
AgNO3 (aq) + NaOH (aq) → AgOH (s) + NaNO3 (aq)
a)
The formation of a nitrate
b)
The (aq), meaning aqueous or dissolved in water
c)
The (s), meaning the formation of a solid
d)
The base (OH) reactant
5.
The number of atoms you begin with in a chemical reaction ...
a)
must be the same as the number of atoms you end with
b)
must be an even number
c)
can be different to the number you finish with
d)
changes depending on how much energy is formed
6.
When balancing equations, the rule is that you can only add ...
a)
Coefficients
b)
Mass
c)
Subscripts
d)
Elements
7.
Balance the following:
____ Fe + ____ Cl2 → ____ FeCl3
a)
1,1,2
b)
1,3,1
c)
2,2,3
d)
2,3,2
8.
Balancing the following:
____ Al + ____ HCl → ____ AlCl3 + ____ H2
a)
1,3,1,2
b)
2,3,2,3
c)
2,6,2,3
d)
3,2,6,2
9.
Which type of reaction is:
2 NaBr + Ca(OH)2 → CaBr2 + 2 NaOH
a)
Synthesis
b)
Single Displacement
c)
Double Displacement
d)
Combustion
10.
Which type of reaction is: C2H4 + 3 O2 → 2 CO2 + 2 H2O
a)
Synthesis
b)
Decomposition
c)
Single Displacement
d)
Combustion
11.
Which type of reaction is:
2 H3AsO4 → As2O5 + 3 H2O
a)
Synthesis
b)
Decomposition
c)
Single Displacement
d)
Combustion
12.
Which type of reaction is:
2 NH3 + H2SO4 → (NH4)2SO4
a)
Synthesis
b)
Decomposition
c)
Single Displacement
d)
Double Displacement
13.
Which type of reaction is:
3 Pb + 2 H3PO4 → 3 H2 + Pb3(PO4)2
a)
Synthesis
b)
Single Displacement
c)
Double Displacement
d)
Combustion
14.
Which type of chemical reaction is shown?
a)
double replacement
b)
composition
c)
combustion
d)
decomposition
15.
Which type of reaction can be recognized by the general pattern?
a)
combustion
b)
single replacement
c)
composition
d)
decomposition
16.
Which type of chemical reaction is this an example of?
Fe2(SO4)3 + KOH → K2SO4 + Fe(OH)3
Fe2(SO4)3 + KOH → K2SO4 + Fe(OH)3
a)
composition
b)
double replacement
c)
single replacement
d)
combustion
17.
Identify the type of reaction shown by this chemical equation:
Al + HCl → AlCl3 + H2
Al + HCl → AlCl3 + H2
a)
single replacement
b)
composition
c)
double replacement
d)
decomposition
18.
Which is the correctly balanced equaition?
a)
Cl2 + 2NaI → 2NaCl + I2
b)
Cl2 + 2NaI → NaCl + 2I2
c)
Cl2 + NaI → NaCl + I2
d)
2Cl2 + NaI → 2NaCl + I2
19.
Fill in the blank to balance the equation: P4 + ........ Cl2 ------> 4 PCl3
a)
2
b)
4
c)
6
d)
12
20.
Two Reactants and One Product
a)
Decomposition
b)
Synthesis
c)
Combustion
d)
Single Replacement
21.
Always starts with a hydrocarbon that reacts with oxygen and produces carbon dioxide and water.
a)
Decomposition
b)
Synthesis
c)
Combustion
d)
Single Replacement
22.
One reactant into several products.
a)
Decomposition
b)
Synthesis
c)
Combustion
d)
Single Replacement
23.
One element replaces another in a compound.
a)
Synthesis
b)
Combustion
c)
Single Replacement
d)
Double Replacement
24.
What does (aq) mean in a chemical reaction?
a)
Ag
b)
silver
c)
aqualirious
d)
aqueous
25.
Si + S8 --> Si2S4
a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Double replacement
26.
KOH + H3PO4 --> K3PO4 + H2O
a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Double replacement
27.
What are the products in the following chemical equation?
2H2 + O2 --> 2H2O
2H2 + O2 --> 2H2O
a)
H2
b)
O2
c)
2H2 + O2
d)
2H2O
28.
What are always the product(s) for the combustion of a hydrocarbon?
a)
O2
b)
Acids and Bases
c)
H2O and CO2
d)
H2 and C
29.
What is the left part of a chemical equation called?
H2 + O → H2O
H2 + O → H2O
a)
Reactants
b)
Products
c)
Yields
d)
Chemical Equation
30.
When balanced, the correct coefficients are:
a)
2, 2, 2
b)
2, 2, 3
c)
3, 2, 2
d)
1, 2, 3
100 %
