Question

Developed photography film is due to :

• A. $AgBr$
• B. $\left[Ag\right(S_2{O}_3{)}_2{]}^{3+}$
• C. $Ag$
• D. $A{g}_{2}O$

Answer 1

Answer: (C)

$Ag$

The developed photography film is due to Ag
The treatment of the exposed photgraphic film with reducing agent is called developing of the film.
A developer is usually an alkaline solution of hydroquinone or alkaline solution of pyrogallol.
The pairs activated by light are reduced to deposit more of black silver.