A, B, C and D illustrate the properties of sulphuric acid whether dilute or concentrated.Choose the role played by sulphuric acid as A, B, C, or D which is responsible for the reactions. Some role(s) may be repeated.
`MgO + H_2SO_4 to MgSO_4 + H_2O`

Options

A. A = Typical acid property
B. B = Nonvolatile acid
C. C = Oxidising agent
D. D = Dehydrating agent

Answer

To determine the role played by sulfuric acid in the reaction \( \text{MgO} + \text{H}_2\text{SO}_4 \rightarrow \text{MgSO}_4 + \text{H}_2\text{O} \), we can analyze the properties of sulfuric acid and the nature of the reactants involved.

### Step-by-Step Solution:

1. **Identify the Reactants and Products**:
- The reactants are magnesium oxide (MgO) and sulfuric acid (H₂SO₄).
- The products are magnesium sulfate (MgSO₄) and water (H₂O).

2. **Understand the Nature of Magnesium Oxide**:
- Magnesium oxide (MgO) is a basic oxide. Basic oxides typically react with acids to form salts and water.

3. **Recognize the Role of Sulfuric Acid**:
- In this reaction, sulfuric acid acts as an acid that reacts with the basic magnesium oxide. This is a typical acid-base reaction where the acid neutralizes the base.

4. **Determine the Property of Sulfuric Acid**:
- Since sulfuric acid is reacting with a base (MgO) to produce a salt (MgSO₄) and water, it demonstrates its typical acidic property.

5. **Conclusion**:
- The role played by sulfuric acid in this reaction is best described by property A, which refers to its typical acidic property.

### Final Answer:
- The correct choice for the role played by sulfuric acid in the reaction \( \text{MgO} + \text{H}_2\text{SO}_4 \rightarrow \text{MgSO}_4 + \text{H}_2\text{O} \) is **A (typical acid property)**.