33. What type of reaction is represented by the equation KCl → K + Cl₂?
Answer: B
Decomposition Reaction
The reaction represented by the equation KCl → K + Cl₂ is classified as a decomposition reaction, where a single compound (KCl) breaks down into its constituent elements (potassium and chlorine).
A) Synthesis
Synthesis reactions involve two or more reactants combining to form a single product. This option is incorrect because the provided equation depicts a breakdown of a compound rather than the formation of one.
B) Decomposition
Decomposition reactions occur when a single compound is broken down into two or more simpler substances. This option is correct as KCl is decomposing into potassium (K) and chlorine gas (Cl₂).
C) Single replacement
Single replacement reactions involve one element replacing another in a compound. This option is incorrect because the equation does not show a replacement; instead, it shows the breakdown of KCl into its individual elements.
D) Double replacement
Double replacement reactions involve the exchange of ions between two compounds, resulting in the formation of two new compounds. This option is incorrect as the equation does not involve two compounds exchanging components; rather, it illustrates the decomposition of a single compound.
Conclusion
The decomposition reaction is the correct classification for the equation KCl → K + Cl₂, as it distinctly involves the breakdown of one compound into simpler substances. All other options fail to accurately describe the process occurring in the reaction, which is focused solely on the disintegration of potassium chloride into potassium and chlorine.