Question

Which of the following is used in photography?

• A. $Ag_2S$
• B. $AgCl$
• C. $Ag _{2} C _{2} O _{4}$
• D. $AgBr$

Answer 1

Answer: (D)

$AgBr$

Answer 2

As AgBr is sensitive to light, it is used for making photographic films. Solution of sodium thiosulphate is used as fixer. It forms a soluble complex with silver halides. $AgBr+2Na_{2}S_{2}O_{3}\to Na_{3}\left[Ag.\left(S_{2}O_{3}\right)_{2}\right]+NaBr$