Exposure of AgCl to sunlight turns it grey due to
(i) formation of silver by decomposition of AgCl
(ii) sublimation of silver chloride
(iii) decomposition with release of chlorine gas from AgCl
(iv) oxidation of silver chloride
(i) only
(i) and (iii)
(ii) and (iii)
(iv) only
Photochemical decomposition: \(2\,AgCl \xrightarrow{sunlight} 2\,Ag + Cl_2\). Silver formed (grey) and chlorine gas released.