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Question 38A 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 articles turn black when kept in the open for a few days? Name the phenomenon involved.(b) Name the black substance formed and give its chemical formula.

Answer»

Question 38



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 articles turn black when kept in the open for a few days? Name the phenomenon involved.


(b) Name the black substance formed and give its chemical formula.


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