On adding dilute HCl to copper oxide powder the solution formed is blue green in colour. Predict the new compound formed which imparts a blue green colour to the solution.

Explanation

To solve the question, we need to analyze the reaction that occurs when dilute hydrochloric acid (HCl) is added to copper oxide (CuO) powder.

### Step-by-Step Solution:

1. **Identify the Reactants**:
- The reactants in this reaction are copper oxide (CuO) and dilute hydrochloric acid (HCl).

2. **Understand the Reaction**:
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