On adding dilute hydrochloric acid to copper oxide powder, the solution formed is blue-green.
(a). Predict the new compound formed which imparts a blue-green colour to solution.
(b). Write a balanced chemical equation of the reaction which takes place.
(c). On the basis of the above reaction, what can you say about the nature of copper oxide?

Explanation

(a) Copper (II) chloride, `CuCl_(2)`
(c). Copper oxide is basic in nature.