Question

1. deduce why various silver compounds are used in photography.

Explanation:

Silver compounds like silver bromide ($AgBr$) are light - sensitive. When light hits them, a chemical reaction occurs (photochemical reaction). The light causes the silver ions ($Ag^{+}$) to gain electrons and form silver atoms ($Ag$). This property allows them to record images as different amounts of light exposure lead to different amounts of silver atom formation, creating a latent image that can be developed.

Answer:

Silver compounds (e.g., silver bromide) are used in photography because they are light - sensitive. Light causes a photochemical reaction where silver ions gain electrons to form silver atoms, enabling the recording of images.