Name the salts that are used in black and white photography. Give reactions when they are exposed to light . Define the type of chemical reaction taking place.

Explanation

Silver chloride (AgCl) and Silver bromide (AgBr)
`2AgCl overset ("Sunlight")rarr2Ag+Cl_(2)`
`2AgBr overset("Sunlight")rarr2Ag+Br`
Those rections in which energy is absorbed (in from of heat, light or electricity ) to break down the rectants is called decomposition reaction .