33. The chemical used in developing photo graphic film is :

(A) silver bromide

(B) hypo

(C) sodium sulphate 

(D) hydroquinone

Ans. (A) silver bromide

Silver bromide (not bromine) is one of the silver compounds used to create the "emulsion" that records the latent image before it is developed. It is the most widely used of the silver salts, which are compounds that react to light and create the latent image.