Question

Take some silver bromide in two dry watch glasses.wrap one of them with a black paper.keep both of them in sunlight for some time
what do you observe?
which glass does the colour of silver bromide chage?
which form of energy was responsible for this chemical changes?

Answer 1

Answer:

Balanced chemical equation when silver bromide is exposed to sunlight and decomposes into silver and bromide

Answer 2

The glass which is not covered with black paper contains silver bromide of different color.

Solar energy is responsible for this chemical changes.

• Silver is very reactive type of metal.
• Silver bromide in the presence of sunlight changes into BLACK color silver and bromine gas comes out.
• When silver bromide comes in contact with sunlight then decomposition reaction takes place hence, silver bromide is a photosensitive material.
• Generally silver bromide is kept in Brown shaded bottles to prevent photo decomposition.