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Which product is mainly responsible for silver chloride turning grey on exposure to light?

Answer and explanation

Correct answer: Silver

In the presence of light, silver chloride undergoes photodecomposition: \(2\mathrm{AgCl}\xrightarrow{\text{light}}2\mathrm{Ag}+\mathrm{Cl_2}\). The metallic silver formed is grey, so AgCl appears grey. Chlorine is also produced, but it does not cause the grey colour.

Related tags

ScienceClass 10Chemical ReactionsPhotodecompositionSilver ChlorideColour Change

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