Silver Compounds
Easychemistry
Photography uses the reaction where AgBr decomposes to Ag on exposure to light. This is an example of:
Select the correct option:
Solution
Incorrect! Answer:
Photoreduction
Silver Bromide (AgBr) is sensitive to light.
- Reaction: 2Ag+Br−+light→2Ag(s)+Br2(g)
- Specifically, the Ag+ ions gain an electron (liberated from Br−) to become metallic silver grains. Since the reduction is triggered by photons (light), it is termed Photoreduction.
- This reaction creates a 'latent image' on photographic film, which is later darkened by further chemical reduction during development.
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About This Question
- Subject
- chemistry
- Chapter
- d- and f-block elements
- Topic
- silver compounds
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Photoreduction
Silver Bromide (AgBr) is sensitive to light.
- Reaction: 2Ag+Br−+light→2Ag(s)+Br2(g)
- Specifically, the Ag+ ions gain an electron (liberated from Br−) to become metallic silver grains. Since the reduction is triggered by photons (light), it is termed Photoreduction.
- This reaction creates a 'latent image' on photographic film, which is later darkened by further chemical reduction during development.
This easy difficulty chemistry question is from the chapter d- and f-block elements, covering the topic of silver compounds. It appeared in the 2025 exam.
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