Question

Silver bromide kept exposed to sunlight is physical or chemical change?

Answer 1

Silver Bromide cas to sunlight is a chemical change

Answer 2

Answer:

A chemical change undergoes when Silver bromide is kept in sunlight.

Explanation:

• Physical change is a change in properties such as texture, shape, or state of the compound.

• Chemical change, on the other hand, represents the formation of a new substance whose molecular composition is changed entirely.

A chemical change occurs in silver bromide ($AgBr$ ) when it is exposed to sunlight. Since it is a light-sensitive material, it gets decomposed to give silver metal and bromine vapors.

• This kind of decomposition reaction is also an example of the photolytic decomposition reaction, where pale yellow ($AgBr$ )  converts into grey color silver in the presence of light.

                    $2AgBr + Sunlight$ → $2Ag + Br_2$

Applications:

• Used in black and white photography
• For use in infrared applications.
• Used in sunglasses
• Applied to semiconductors