Question

The following diagram displays a chemical reaction. Observe carefully and answer the following questions:

i. Identify the type of chemical reaction that will take place and define it. How will the colour of the salt change?
ii. Write the chemical equation of the reaction that takes place.
iii. Mention one commercial use of this salt.

Answer 1

i. Photochemical decomposition reaction will take place. Photochemical decomposition reaction is the reaction in which compound decomposes in the presence of light to form simple substances. Thecolour of salt (i.e., silver chloride) will change from white to grey.

iii. Silver chloride is used in black and white photography.