Which among the following statement (s) is /are true? Exposure of silver chloride to sunlight for a long duration turns grey due to
(i) the formation of silver by decomposition of silver chloride.
(ii) sublimation of silver chloride.
(iii) decomposition of chlorine gas from silver chloride.
(iv) oxidation of silver chloride.

Options

A. (i) only
B. (i) and (iii)
C. (ii) and (iii)
D. (iv) only

Answer

A

Explanation

In the presence of sunlight, the heavy amount of energy of light decomposes AgCl to silver `(Ag^(+))` and chloride `(Cl^(-))` ions. The silver flakes are truly black which when fully spread over white silver chloride looks grey.