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?

(a) The new compound formed is cuprous chloride. It imparts a blue-green colour to the solution.

(b) CuO (s) + 2HCl (aq) → CuCl2 (aq) + H2O


(c) On observing the above reaction, it can be inferred that copper oxide is basic in nature. when limestone reacts with dilute HCl


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