Question

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

• A. True
• B. False

Answer 1

The correct option is A True

Decomposition of silver chloride in the presence of light -

• Decomposition reactions that take place during the absorption of light are called photochemical decomposition reactions.
• When silver chloride is exposed to light, it decomposes to form silver metal and chlorine gas.
• In this reaction, the white colour of silver chloride changes to greyish white due to the formation of silver metal.

$\underset{\mathrm{S}\underset{\mathrm{White}}{\mathrm{ilver}\mathrm{chloride}}}{2\mathrm{AgCl}\left(\mathrm{s}\right)}\stackrel{\mathrm{Light}}{\to }\underset{\underset{\mathrm{Greyish}\mathrm{white}}{\mathrm{Silver}}}{2\mathrm{Ag}\left(\mathrm{s}\right)}+\underset{\underset{\mathrm{Greenish}\mathrm{yellow}}{\mathrm{Chlorine}}}{{\mathrm{Cl}}_2\left(\mathrm{g}\right)}$

Therefore, the given statement is true.