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Which of the following equations represents a decomposition reaction that occurs in the presence of light?

Answer and explanation

Correct answer: \(2AgCl \xrightarrow{sunlight} 2Ag + Cl_2\)

Silver chloride decomposes in sunlight to form silver and chlorine gas: \(2AgCl \xrightarrow{sunlight} 2Ag + Cl_2\). Therefore, it is a photochemical decomposition reaction. In options B and D, heat provides the energy for decomposition, whereas in option C, electricity does so.

Related tags

Chemical ReactionsDecomposition ReactionsPhotochemical DecompositionSilver ChlorideChemical EquationsClass 10 Science

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