WorksheetsChemical Equations: Identifying and Balancing Reactions
Total questions: 32
Worksheet time: 16mins
Which of the following is a balanced chemical equation?
H2 + O2 → H2O
2H2 + O2 → 2H2O
H2 + O2 → 2H2O
2H2 + 2O2 → 2H2O
Fill in the blank: In a balanced chemical equation, the number of atoms for each element is the same on both the ______ and the ______.
A) reactant, product
B) left, right
C) start, end
D) top, bottom
Which of the following is not a type of chemical reaction?
Synthesis
Decomposition
Photosynthesis
Combustion
Fill in the blank: Chemical reactions can be organized into 5 categories, including Synthesis, Decomposition, Single Displacement, Double Displacement, and ________.
A) Photosynthesis
B) Combustion
C) Evaporation
D) Condensation
What is a synthesis reaction?
A) A reaction where two or more reactants combine to form a single product.
B) A reaction where a single reactant breaks down into multiple products.
C) A reaction where reactants exchange components to form new products.
D) A reaction where energy is absorbed from the surroundings.
Fill in the blank: In a synthesis reaction, the general formula is A + B → ____.
A) A + B
B) AB
C) A - B
D) BA
What is a decomposition reaction?
One reactant breaks down to form two or more products.
Two reactants combine to form one product.
A reactant is replaced by another element.
Two elements combine to form a compound.
Fill in the blank: In a decomposition reaction, 2 H2O decomposes into 2 H2 and ____.
O2
CO2
H2O
H2
Which type of reaction is represented by the equation: 2 Na + Cl₂ → 2 NaCl?
Synthesis
Decomposition
Single Replacement
Double Replacement
Fill in the blank: The reaction ZnCO₃ → ZnO + CO₂ is a ________ reaction.
A) Synthesis
B) Decomposition
What is a single displacement reaction?
A reaction where one element replaces another in a compound.
A reaction where two elements combine to form a compound.
A reaction where a compound breaks down into two elements.
A reaction where elements exchange places in two compounds.
In the single displacement reaction 2 HCl + Zn → ZnCl2 + ____, what is the missing product?
H2
Cl2
Zn
HCl
What is a double displacement reaction?
A reaction where one reactant is replaced by another
A reaction where part of one reactant switches places with part of another reactant
A reaction where two reactants combine to form one product
A reaction where a single reactant breaks down into two products.
In the double displacement reaction MgCl2 + 2 NaF → MgF2 + 2 NaCl, what does MgCl2 react with?
NaCl
MgF2
NaF
AD
Which type of reaction is AgF + KCl → AgCl + KF?
Single Displacement
Double Displacement
Fill in the blank: The reaction K + NaCl → KCl + Na is a ________ reaction.
Single Displacement
Double Displacement
What are the products formed when a hydrocarbon reacts with oxygen?
Carbon dioxide and water
Carbon monoxide and hydrogen
Methane and oxygen
Water and oxygen
Fill in the blank: In the combustion of methane (CH4), the balanced chemical equation is CH4 + 2O2 → ___ + 2H2O.
CO2
CO
H2
O2
Which type of reaction is represented by the equation AB → A + B?
Synthesis
Decomposition
Single Displacement
Combustion
Fill in the blank: The reaction CxHy + O2 → CO2 + H2O is an example of a ________ reaction.
Synthesis
Decomposition
Combustion
Double Displacement
What type of chemical reaction is represented by the equation: 2 Fe + O2 → 2 FeO?
Synthesis
Decomposition
Single Displacement
Double Displacement
Combustion
Fill in the blank: The reaction 2 Al2O3 → 4 Al + 3 O2 is an example of a ________ reaction.
Synthesis
Decomposition
Single Displacement
Double Displacement
Combustion
Identify the type of reaction for Zn + CuCl2 → ZnCl2 + Cu.
Synthesis
Decomposition
Single Displacement
Double Displacement
Combustion
Classify the following chemical reaction: CaCO3 + 2 HCl → CaCl2 + H2CO3.
Synthesis
Decomposition
Single Displacement
Double Displacement
Combustion
Classify the following chemical reaction: 2 Fe(OH)3 → Fe2O3 + 4 H2O.
Synthesis
Decomposition
Single Displacement
Double Displacement
Combustion
Classify the following chemical reaction: H2 + 2 AgNO3 → 2 Ag + 2 HNO3.
Synthesis
Decomposition
Single Displacement
Double Displacement
Combustion
Classify the chemical reaction: AgNO3 + KBr → KNO3 + AgBr.
Synthesis
Decomposition
Single Displacement
Double Displacement
Combustion
Classify the chemical reaction: 2 NaBr + Cl2 → Br2 + 2 NaCl.
Synthesis
Decomposition
Single Displacement
Double Displacement
Combustion
Classify the chemical reaction: C3H8 + 5 O2 → 4 H2O + 3 CO2.
Synthesis
Decomposition
Single Displacement
Double Displacement
Combustion
Classify the following chemical reaction: Pb + CuCl₂ → PbCl₂ + Cu.
Synthesis
Decomposition
Single Displacement
Double Displacement
Combustion
Classify the following chemical reaction: MgO + H₂O → Mg(OH)₂.
Synthesis
Decomposition
Single Displacement
Double Displacement
Combustion
Classify the following chemical reaction: Na₂S + 2 HCl → 2 NaCl + H₂S.
Synthesis
Decomposition
Single Displacement
Double Displacement
Combustion
