Question

Why white silver chloride change into gray in presence of sunlight

Answer 1

Silver chloride turns grey when kept in sunlight.

Explanation:
Silver chloride which is white colour turns to grey colour silver due to decomposition reaction which occur in presence of sunlight. Such reactions are called as Photo chemical reactions.
Here chlorine gas will escape.

Silver chloride (s)---> Silver(s) + Chlorine.(g)
 
           Sunlight 
2AgCl(s)-------------> 2Ag(s)+Cl2(g)
 white                       Grey 

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