Chemical Reactions Worksheet
Grade 10 Science worksheet covering types of chemical reactions, balancing equations, and factors affecting reaction rates.
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Chemical Reactions Worksheet
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Read each question carefully and answer to the best of your ability. Show all your work for calculations.
1. Which of the following is NOT a sign that a chemical reaction has occurred?
Change in color
Formation of a precipitate
Change in state (e.g., solid to liquid)
Production of heat or light
2. What type of reaction is represented by the general equation A + B → AB?
Decomposition
Synthesis
Single Replacement
Double Replacement
3. The law of conservation of mass states that matter cannot be created or in a chemical reaction.
4. A substance that speeds up a chemical reaction without being consumed in the reaction is called a .
5. In an reaction, energy is absorbed from the surroundings, causing a decrease in temperature.
6. Balance the following chemical equation:
Fe + O₂ → Fe₂O₃
7. List three factors that can affect the rate of a chemical reaction.
8. All chemical reactions release heat.
True
False
9. A catalyst is consumed during a chemical reaction.
True
False
Match the type of reaction with its description.
10. Synthesis Reaction
a. One element replaces another in a compound.
11. Decomposition Reaction
b. Two or more reactants combine to form a single product.
12. Single Replacement Reaction
c. A compound breaks down into two or more simpler substances.
13. Analyze the reaction coordinate diagram below.
Is this an endothermic or exothermic reaction? Explain your reasoning.