Question

how silver chloride is decomposed and how the colour of Silver chloride changes

Answer 1

Answer

Colour if AgCl changes to grey when it is exposed to sunlight....

This is an example of photolytic decomposition , that is, split in presence of light..

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Answer 2

When white silver chloride is left exposed in the sunlight than, a black metallic colour silver and chlorine gas are produced. Decomposition Reaction: It is a reaction that takes place by the decomposition of a substance through various sources of energy