Question

Baking soda firzes with vinegar? A shiny copper object turns green after sometime ? ​

Answer 1

Explanation:

Just as iron that is left unprotected in open air will corrode and form a flaky orange-red outer layer, copper that is exposed to the elements undergoes a series of chemical reactions that give the shiny metal a pale green outer layer called a patina.

Answer 2

Answer:

Copper is a reactive metal. In a process called oxidation, copper reacts slowly in the presence of oxygen, resulting in copper oxide. ... Verdigris gives copper a green color, but it is not as durable as natural patinas, and it is soluble.