Practice Decomposition Reactions - 4.5.2 | Chapter 4: Chemical Reactions and Equations: Transforming Matter | IB 9 Chemistry
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Decomposition Reactions

4.5.2 - Decomposition Reactions

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Practice Questions

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Question 1 Easy

What is a decomposition reaction?

💡 Hint: Think about breaking something down into its basic parts.

Question 2 Easy

Name a simple example of a decomposition reaction.

💡 Hint: What do you get when you heat chalk?

4 more questions available

Interactive Quizzes

Quick quizzes to reinforce your learning

Question 1

What occurs during a decomposition reaction?

A compound combines with another.
A compound breaks down into simpler substances.
A compound undergoes a physical change.

💡 Hint: Think about what 'decompose' means.

Question 2

Thermal decomposition requires which of the following?

Light
Electricity
Heat

💡 Hint: Consider which type of energy is mentioned for thermal processes.

3 more questions available

Challenge Problems

Push your limits with advanced challenges

Challenge 1 Hard

Consider the equation 2KClO₃ → 2KCl + 3O₂. Identify the type of reaction and explain the role of energy in this process.

💡 Hint: Think about the relationship between energy and bond breaking.

Challenge 2 Hard

Write and balance the equation for the decomposition of ammonium dichromate (NH₄)₂Cr₂O₇.

💡 Hint: Remember to check if the equation is balanced in terms of atoms on both sides.

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