Silver articles and copper articles get a black and green coating respectively when kept for a long time in air. Mentions the reason for this and identify the chemical name of the coating in each case.

Name the metal that gives a green coating when exposed to air?

A student has been collecting silver coins and copper coins. One day he observed a black coating on silver coins and a green coating on copper coins. Which chemial phenomenon is responsible for these coatings. Write the chemical name of black and green coatings.

A silver articles generally turns black when kept in the open for a few days. Name the black substance formed and give its chemical formula.

A silver articles generally turns black when kept in the open for a few days. Why do silver articles turn black when kept in the open for a few days?Name the phenomenon involved.

On heating copper powder in air, the surface of copper powder becomes coated with black CuO. How can this black be converted into brown copper? Write chemical equation for the reaction that occurs during the colour change.

Write balanced chemical equation and identify the type of chemical reaction taking place when: On heating copper powder in air in a china dish, the surface of copper powder turns black.