Question

Which among the following statement(s) is (are) true?

Silver chloride on exposure to sunlight for 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.

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

Answer 1

The correct option is A (i) only

When silver chloride is exposed to light, it decomposes to form silver metal and chlorine gas.

$2AgCl\stackrel{light}{\to }2Ag+C{l}_2$

White colour of silver chloride changes to grey due to formation of silver metal.