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Chemical Reactions and Equations — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceChemical Reactions and Equations3 Marks
Question
What happens when silver chloride is exposed to sunlight? Write a chemical equation for this reaction. Also give one use of such a reaction.
✓

Answer

When silver chloride is exposed to light, it decomposes to form silver metal and chlorine gas.
$2\text{AgCl}(\text{s})\xrightarrow[\text{Decomposition}]{\ \ \ \ \ \ \ \ \ \ {\text{Light}}\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ }2\text{Ag(s)}\ \ \ \ +\ \ \ \ \text{Cl}_2(\text{g})\\ ^\text{Silver Chloride} \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ ^\text{Silver} \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ ^\text{Chlorine}\\ \ \ ^\text{(White)}\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ ^\text{(Grey-white)}\ \ \ \ \ \ \ ^\text{(Yellowish-green)}$
This reaction is used in black and white photography.

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