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.
Frequently asked questions
What is the correct answer to this question?
It decomposes in light to form silver and bromine.
Why is this the correct answer?
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.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Chemical Reactions and Equations.
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