Question

What is Photochemical reaction? Give an Example?

Answer 1

Photochemical reaction is a reaction which takes place in the presence of light
For example
2AgCl ---------> 2Ag + Cl in the presence of sunlight
The silver Chloride turns grey

Answer 2

Photochemical reaction:

  A Photochemical reaction is a reaction which takes place when a chemical process absorbs light energy as its energy source. The example is photosynthesis.  

  In photosynthesis, light energy is captured by the chlorophyll present in the thylakoids of the chloroplast in order to produce photons to facilitate the conversion of water and carbon dioxide into sucrose or starch.  

  The photons from the light energy split water and enable ATP production that drives the entire process.