Silver iodide, AgI is a yellow crystalline solid. But when it is exposed to sunlight, it forms solid grey silver and iodine. Why? Give one practical application of this reaction and write the equation also.
When silver iodide Crystal are exposed to sunlight the silver ion gets reduced to silver metal and iodide ions are oxidized to iodine gas. 2 moles of Silver iodide gives 2 moles of silver metal and 1 mole of iodine gas. Application of this reaction is in silver based photography.
