Question

Exposure of silver chloride in sunlight for a long time turns grey in colour

Answer 1

Exposure of silver chloride to sunlight for a long duration turns grey this is because chlorine gas from silver chloride gas liberated and leaves the silver as grey in colour...
AgCl ----> Ag(s)+ Cl2(g)
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Answer 2

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Silver chloride turns grey when kept insunlight. Explanation: Silver chloridewhich is white colour turns to grey colour silver due to decomposition reaction which occur in presence ofsunlight. Such reactions are called as Photo chemical reactions