Which of the following reactions represents the change that occurs when a photographic film is exposed to sunlight?

Gloryokoli

7 years ago

Ag has received an electron to be reduced to Ag metal. it captured an electron in the presence of sunlight in order to form an image on a photographic film

innogson

1 year ago

Let’s break down the options:
A. Ag → Ag⁺ + e⁻
This is oxidation, not reduction. It’s the opposite of what happens.
Wrong

B. Ag⁺ + e⁻ → Ag
This is reduction. Silver ion gains an electron and becomes metallic silver.
Correct Answer

C. 2Ag + Br₂ → AgBr
This shows formation of AgBr, not the reaction when exposed to light.
Wrong

D. Ag⁺ + Br⁻ → AgBr
Again, this is just the formation of silver bromide, not what happens during exposure to light.
Wrong

Final Answer:
B. Ag⁺ + e⁻ → Ag

🧠 Memory Trick:
In photography:
Ag⁺ gains e⁻ → Ag (shiny image spot forms)
Think:
“Silver smiles when it gains an electron” (that’s how the picture smiles too!)