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A student classified the reaction
\(2AgCl \xrightarrow{\text{sunlight}} 2Ag + Cl_2\)
as a displacement reaction. What is its correct classification?

Answer and explanation

Correct answer: It is a photodecomposition reaction because one compound breaks down into simpler substances in sunlight.

This is a photodecomposition reaction. A single compound, \(AgCl\), decomposes in sunlight to form silver \(Ag\) and chlorine gas \(Cl_2\). The equation is balanced, with 2 Ag atoms and 2 Cl atoms on each side. In a displacement reaction, a free element replaces another element in a compound; no such free reactant is present here.

Related tags

Chemical ReactionsDecomposition ReactionPhotodecompositionSilver ChlorideReaction Classification

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