Question

A white coloured substance was placed in sunlight for some time . it was seen that, it turned grey after sometime. now answer the following questions:-
(1.) Why the White coloured substance turned grey?
(2.) what is the role of Sunlight during the reaction?
(3.) give the name and the chemical formula of reactants and products in this reaction.

Answer 1

Answer:

1. silver chloride turns grey in sunlight to form silver metal

2. it helps in decomposition to form Cl[gas] & Ag{metal} which is grey in color. 

3. 2AgCl(s)in presence of sunlight = 2Ag(s) +Cl2

4. Photolitic decomposition reaction.

Explanation:

Answer 2

The answers for the following questions are as follows:

(1.) The white coloured compound turned grey due to a chemical reaction taking place.

(2.) Sunlight provides the energy required for the reaction to take place.

(3.) The reaction taking place is Photo decomposition.

- It is the decomposition of silver chloride to form chlorine gas and silver metal which is grey in color. 

- It can be represented as:

2 AgCl (s) + Sunlight → 2 Ag (s) + Cl2 (g)