Question

Answer plzz❣️
You might have noted that when copper powder is heated in a China dish, the reddish brown surface of copper powder becomes coated with a black substance.

a. why was this black substance formed?

b. What is this black substance ?

c. Write the balanced chemical equation reaction that takes place.

d. How can the black coating on the surface be turned reddish brown ? Also Identify
the type of reaction involved in this.​

Answer 1

Answer:

a.when copper is heated in the presence of oxygen oxygen is added to copper and copper oxide is formed

b.copper oxide

c.2cu+2o_2cuo

d.it undergoes oxidation