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Question

Why do Silver Halides decompose In light?


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Solution

Silver Halides:

  • Silver halide is one of the chemical compounds which are formed by the reaction between silver and halogen atoms.
  • Silver halide is a light-sensitive chemical.
  • When silver halides are exposed to light, they undergo a photolytic decomposition reaction to produce silver metal and halogen.

Example: Decomposition of Silver bromide

2AgBr(s)Silverbromideā†’Light2Ag(s)Silver+Br2(g)Bromine

  • These compounds are used in photographic film and paper as they would react with light to form the image by reducing silver halides to silver.

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