**Category:** Inorganic Chemistry  
**Subtype:** Chemical Reactions  
**Problem Description:** This problem involves observing the reactions of zinc metal with dilute sulfuric acid and the effects of adding different sulfate solutions (CuSO₄ and MgSO₄) on the reaction. The task is to evaluate the correctness of several conclusions drawn from the experiment.

**Key Points:**
1. The experiment involves two test tubes with dilute sulfuric acid and zinc.
2. The addition of CuSO₄ and MgSO₄ leads to different observations regarding gas evolution and the corrosion of zinc.
3. The conclusions relate to the nature of the reactions (chemical and electrochemical) and the effects of the different sulfate solutions.

**Question:** Determine how many of the provided conclusions about the experiment are correct.