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What main change occurs when silver bromide is exposed to light?

Answer and explanation

Correct answer: It decomposes in light to form silver and bromine.

Silver bromide is a light-sensitive compound. On exposure to light, it undergoes photodecomposition to form silver and bromine: \(2AgBr \xrightarrow{\text{light}} 2Ag + Br_2\). The silver formed is grey, producing a visible colour change. Option C refers to formation of silver oxide by oxidation, not to photodecomposition.

Related tags

Class 10 ScienceChemical ReactionsPhotodecompositionSilver BromideLight-Sensitive Compounds

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