Why white silver chloride turns grey in sunlight?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. Due to the decomposition of silver chloride into silver and chlorine by light.
White silver chloride turns grey in sunlight due to the decomposition of silver chloride into silver and chlorine by light. When exposed to sunlight, particularly UV light, silver chloride (AgCl) undergoes a photochemical reaction. This reaction breaks down AgCl into metallic silver (Ag) and chlorine gas (Cl₂), resulting in the formation of grey or black silver. This is a common process known as photodecomposition.