Chemistry Worksheet: Chemical Reactions
General
General
2 questions
~4 mins
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About This Worksheet
A medium difficulty Science worksheet on chemical_reactions for grade 7 students. Includes questions on Chemical Equations and Balancing, Types of Chemical Reactions, Reaction Rates and Factors.
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Chemistry Worksheet: Chemical Reactions
Subject: GeneralGrade: General
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Chemistry Worksheet: Chemical Reactions
Instructions: Answer the following questions about chemical reactions. Read each question carefully and choose or write your answer in the space provided.
A
Chemical Equations and Balancing
1.
Balance the following chemical equation: ___ H₂ + ___ O₂ → ___ H₂O
[1 mark]2.
What is the coefficient for oxygen (O₂) when the equation 4 Fe + 3 O₂ → 2 Fe₂O₃ is balanced?
[1 mark]B
Types of Chemical Reactions
1.
Which type of reaction is represented by the following: 2 H₂ + O₂ → 2 H₂O?
[1 mark]2.
Identify the type of reaction: AB → A + B
[1 mark]3.
In a combustion reaction, what are the common products formed?
[1 mark]C
Reaction Rates and Factors
1.
Which factor can increase the rate of a chemical reaction: increasing temperature, decreasing concentration, or decreasing surface area?
[1 mark]D
Chemical Equilibrium
1.
What does it mean when a chemical reaction is at equilibrium?
[1 mark]E
Redox Reactions
1.
In a redox reaction, what is the role of oxidation?
[1 mark]F
Stoichiometry
1.
If 4 moles of hydrogen gas react with excess oxygen, how many moles of water are produced?
[1 mark]2.
In the reaction 2 Na + Cl₂ → 2 NaCl, how many moles of sodium chloride are produced from 3 moles of sodium?
[1 mark]Quick Actions
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Details
- Created
- 10/7/2025
- Updated
- 12/29/2025
- Type
- worksheet