Question

Give reasons for the following:
1. Zinc can displace copper from copper sulphate solution.
2. Silver articles become black after sometime when exposed to air.
3. A metal sulphide is converted to its oxide to extract the metal from sulphide ore.​

Answer 1

Answer:

1. because zinc is high reactive metal than copper .

2. when a metal come in contact with water, moisture, humidity they get corrode that's why if we leave silver for some time in air it gets corrode and a thin layer of black coating started, This process is known as corrosion.