Question

copper losses its brown layer gradually when exposed to air​

Answer 1

Mate here is your answer...

COPPER loses its brown color gradually when it is exploded to air because it reacts with the available oxygen in air to form oxide.

hope you're happy with my answer.

Answer 2

The copper looses its brown color when exposed to the air due to the effect of corrosion.

Explanation:

• The corrosion is a process by which the metal reacts with the air and water. This results in the oxidation of the metal. Thus the stable forms of metals are formed like oxides, hydroxides and sulfides.
• The metal looses its quality and cost due to corrosion.
• The metal copper when comes in contact with air it looses its brown color and  its color becomes green.
• During the rainy days the air consists of moisture then the copper vessel when react with the moisture bearing air results in the formation of the copper carbonate and copper hydroxide. This gives a green color over the surface of the copper metal.

Learn more about copper:

Blister copper is a: https://brainly.in/question/12227243

Copper + -------------- = copper oxide​: https://brainly.in/question/10084255