Question

Silver Article Turns Black When Kept In The Open For A Few Days Due To Formation Of ______

Answer 1

Answer:

A silver article generally turns black when kept in the open for few days. The article when rubbed with toothpaste again starts shining. (a) Why do silver articles turn black when kept in open for few days? Name the phenomenon involved. (b) Name the black substance formed and give its chemical formula

Answer 2

Silver article turns black when kept in the air because silver reacts with sulphur compounds such as hydrogen sulphide (H2S) present in air and forms silver sulphide.