Question

write the chemical equation involved in the following chemical reaction a. white washing b. black and white photography

Answer 1

For white washing Calcium Hydroxide is used. It is applied on the walls and in a few days,it reacts with the carbondioxide present in the air and forms Calcium Carbonate(CaCO3) which is quite white and gives a shiny appearance to the walls.
CaOH+Co2--- CaCO3+H2O

For black amd white photography, silver bromide or silver chloride are used.

Answer 2

Answer:

In the pic

Explanation:

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