Question

Which compound is used in photography?
A.\[AgN{{O}_{3}}\]
B.AgO
C.AgBr
D.AgCl

Answer 1

Hint: Generally silver slats are going to be used in photography. When the photography film is exposed to light, then the silver halide crystals are going to change to record a latent image and later that can be developed into a photograph.

Complete answer:
A yellowish powder of silver bromide (AgBr), which darkens on contact to light.
It is produced by the reaction of silver nitrate with potassium bromide.
The preparation of Silver bromide is as follows.
\[AgN{{O}_{3}}+KBr\to AgBr+KN{{O}_{3}}\]
AgBr is not soluble in water and used mainly in the manufacture of photographic films.
The sensitive surface of ordinary photograph film contains a layer of gelatine carrying silver bromide crystals. By exposing the camera to light produces an undistinguishable change.
Therefore AgBr (silver bromide) is used in photography.
So, the correct option is C.
Additional information:
AgBr is an inorganic compound, silver and bromide held together with a polar covalent bond.
Silver bromide is a light sensitive compound.
Silver bromide is not a hazardous material.
Upon contacting skin or eye, it will irritate and change to greyish colour, like the other silver compounds.
Inhalation of AgBr results in sneezing and difficulty in breathing.


Note:
Silver bromide occurs as a mineral called bromargyrite in substantial amounts. But, it is usually attained in large amounts over chemical synthesis only. Silver bromide is also used in infrared applications and used in light sensitive eyeglasses, and in the semiconductors.