WorksheetsUnit 5 Chemical Reactions Test rev 2026
Total questions: 17
Worksheet time: 28mins
In this equation, which are the reactant(s)? Mg(s) + O2(g) --> MgO(s)
Mg(s)
O2(g)
Mg(s) + O2(g)
MgO(s)
Which type of chemical reaction is shown?
double replacement
combustion
synthesis
decomposition
Which is the name of the kind of solid substance formed in the picture?
aqueous
precipitate
coordinate complex
decomposition
Which type of reaction can be recognized by the general pattern
A + BX --> AX + B ?
combustion
synthesis
single replacement
decomposition
What is the correct description of this reaction?
Cu(s) + 2HCl(aq) → CuCl2(aq) + H2(g)
Hydrogen gas reacts with a solution of copper chloride to produce solid copper metal in a solution of hydrochloric acid.
A solution of copper metal reacts with solid hydrochloric acid to produce a solution of copper chloride and hydrogen gas
Hydrogen gas reacts with solid copper chloride to produce solid copper metal in a solution of hydrochloric acid.
Solid copper reacts with a solution of hydrochloric acid to produce a solution of copper chloride and hydrogen gas.
Which of these chemical equations correctly represents the reaction: solid copper metal, Cu, reacts with a solution of silver nitrate, AgNO3, to produce a solution of copper nitrate, Cu(NO3)2, and silver metal, Ag?
2Ag(s) + Cu(NO3)2(l) → 2AgNO3(l) + Cu(s)
2Ag(s) + Cu(NO3)2(aq) → 2AgNO3(aq) + Cu(s)
2AgNO3(l) + Cu(s) → 2Ag (s) + Cu(NO3)2(l)
2AgNO3(aq) + Cu(s) → 2Ag(s) + Cu(NO3)2(aq)
When the chemical equation below is correctly balanced, what coefficient is placed in front of water?
C2H6(g) + O2(g) → CO2(g) + H2O(g)
3
4
6
12
What are the correct coefficients when this equation is balanced?
Sb + O2 → Sb4O6
1, 2, 10
4, 6, 1
4, 3, 1
10, 5, 1
Which are the product(s) of this chemical reaction?
FeCl3 + NH4OH →
Fe(OH)3 + NH4Cl
NH4Fe + Cl3OH
NCl3 + FeOH5
FeCl3 + NOH4
Which type of chemical reaction would this be classified as:
C3H8 + O2 → CO2 + H2O
synthesis
double replacement
combustion
decomposition
Identify the type of reaction shown by this chemical equation:
Al + HCl → AlCl3 + H2
single replacement
synthesis
double replacement
decomposition
Which type of chemical reaction is this an example of?
Fe2(SO4)3 + KOH → K2SO4 + Fe(OH)3
synthesis
double replacement
single replacement
combustion
To balance a chemical equation, you can change _____.
the coefficients
the number of reactants
chemical formulas
the subscripts and the coefficients
When an aqueous solution of lead (II) nitrate is combined with an aqueous solution of
sodium sulfate, a white precipitate of lead (II) sulfate forms. Write the skeleton equation,
then using coefficients, rewrite the equation so it is balanced.
Classify the following reaction: H₂+Cl₂→2HCl
Synthesis
Decomposition
Single Displacement
Double Displacement
Claim-Evidence-Reasoning (CER):
A student claims that the following equation is correctly balanced: 2Na+Cl₂→2NaCl. Using the provided equation, justify whether the student's claim is valid using evidence and the reasoning based on the Law of Conservation of Mass.
Which of the following is a balanced chemical equation for the complete combustion of methane (CH₄)?
CH₄+2O₂→CO₂+2H₂O
2CH₄+3O₂→2CO₂+3H₂O
CH₄+O₂→CO₂+H₂O
CH₄+2O₂→CO+2H₂O
