Q1. What is/are the element(s) or compound(s) that can be used in black and white photography?
- (a) Only AgCl
- (b) Only AgBr
- (c) Only Ag
- (d) AgCl and AgBr
Answer & solution
Answer: (d) AgCl and AgBr
Photographic film usessilver halidesthat are sensitive to light.
Silver Chloride (AgCl)- decomposes when exposed to light
Silver Bromide (AgBr)- most commonly used in photographic films
Both compounds turn dark when exposed to light due to formation of metallic silver.
Pure silver (Ag) is the product, not the light-sensitive material used.
Answer: Option 4 → AgCl and AgBr