Question

Name 2 salts that are used in white and black photography.Give reactions when they are exposed to light ?

Answer 1

SILVER CHLORIDE AND SILVER IODIDE HAVING THE CHEMICAL FORMULA    AgCl           AND               AgI        RESPECTIVELY ARE USED IN WHITE AND BLACK PHOTOGRAPHY.

REACTION OF SILVER CHLORIDE WITH SUNLIGHT
               
                    sunlight
2AgCl(s)---------------------> 2 Ag(s) + $Cl_{2}$ (g)
 white                                           grey

REACTION OF SILVER IODIDE WITH SUNLIGHT
                   
                             sunlight
     2AgI     -------------------------------->   2Ag + $I_{2}$
    white                                                       grey