Question

Iodine is used in photography in the form of silver iodide.

• A. True
• B. False

Answer 1

The correct option is A True

• Three silver compounds used in photography are silver chloride $\left(\mathrm{AgCl}\right)$, silver bromide $\left(\mathrm{AgBr}\right)$, and silver Iodide $\left(\mathrm{AgI}\right)$.
• The areas of the photograph exposed to light energy become black and the parts which are not exposed to light are white in colour because $\left(\mathrm{AgCl}\right)$ or $\left(\mathrm{AgBr}\right)$ are white in colour).
• Light is absorbed in this reaction so it is an endothermic reaction. Both compounds decompose into their respective metal (Ag) and non-metal gases $({\mathrm{Cl}}_2,{\mathrm{Br}}_2)$
• Thus, the given statement is True. i.e., Iodine is used in photography in the form of silver iodide.