Question

2. Copper vessel is tarnished due to a. Reduction b. Oxidation c. Both Oxidation and Reduction d. All of the above please write fast and full answer with explanation please.​

Answer 1

Answer:

the ans is oxidation

Explanation:

So, basically copper vessels generally get tarnished (change color) when kept in open. It is due to the formation of a black layer of copper oxide and a green layer of copper carbonate on the copper vessel when it comes in contact with the light and oxygen. These copper oxide and copper carbonate are basic in nature.

Answer 2

b. Oxidation causes tarnishing in copper vessel.

• Copper is a transition metal with reactive nature. Similar to rusting in iron, copper reacts with oxygen present in air. The product is copper oxide.
• Tarnish is brown or black in colour.
• Copper tarnish can be prevented by protecting it through a coating to block contact with air.
• Tarnish also forms over magnesium, aluminium etc.