Do eggs have a chemical reaction?

Answer 1

Fertilized eggs undergo a great many chemical reactions as they develop into chickens. Unfertilized eggs don't undergo chemical reactions until such time as they are either cooked and eaten, or go bad and are thrown away.

Answer 2

Eggs do undergo chemical reactions when cooked. Heating eggs denatures the proteins, changing their structure and texture. This process also causes the Maillard reaction to occur, resulting in the browning and development of new flavors.