Question

Q. A silver article generally turns black when kept in the open for a few days. The article when rubbed with toothpaste again starts shining
a) Why do silver artides turns black when kept in the open for a few days? Name the phenomenon involved.
b) Name the black substance formed and gives its chemical formula & reactions.​

Answer 1

silver turns black because silver react with atmosphere water and when rubbed with toothpaste beacuse toothpaste contain flourine it removes the water from the silver