Grade 12 Chemistry: Identifying Reactions Worksheet
A Grade 12 Chemistry worksheet focusing on identifying different types of chemical reactions, including synthesis, decomposition, single displacement, double displacement, combustion, and redox reactions.
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Grade 12 Chemistry: Identifying Reactions
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Read each question carefully and provide the best answer. Identify the type of chemical reaction described or shown. For redox reactions, indicate if it is oxidation or reduction.
1. Which type of reaction is represented by the general equation A + B → AB?
Decomposition
Synthesis
Single Displacement
Double Displacement
2. The reaction 2KClO₃(s) → 2KCl(s) + 3O₂(g) is an example of a:
Synthesis reaction
Decomposition reaction
Combustion reaction
Single displacement reaction
3. In a reaction, an element reacts with a compound, displacing another element from the compound.
4. The general form for a double displacement reaction is AX + BY → + .
5. A reaction that involves a substance rapidly combining with oxygen to produce heat and light is called a reaction.
6. Balance the following chemical equation and identify the type of reaction: Fe(s) + O₂(g) → Fe₂O₃(s)
7. Describe the key characteristics that differentiate a single displacement reaction from a double displacement reaction.
8. All combustion reactions are also redox reactions.
True
False
9. In a redox reaction, the substance that loses electrons is said to be reduced.
True
False
Match the reaction type with its description:
10. Synthesis
a. Two compounds exchange ions to form two new compounds.
11. Decomposition
b. A single compound breaks down into two or more simpler substances.
12. Single Displacement
c. Two or more simple substances combine to form a more complex substance.
13. Double Displacement
d. An element reacts with a compound, displacing another element.
Consider the following chemical reaction:
14. The image above shows a thermite reaction where iron(III) oxide reacts with aluminum to produce molten iron and aluminum oxide: Fe₂O₃(s) + 2Al(s) → 2Fe(l) + Al₂O₃(s) Identify all types of reactions that apply to the thermite reaction (e.g., redox, single displacement, etc.) and explain your reasoning for each.
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