Of all the three common mineral acids, only sulphuric acid is found to be suitable for making the solution acidic because :

Options

A. It does not react with `KMnO_(4)` or the reducing agent
B. Hydrochloric acid reacts with `KMnO_(4)`
C. Nitric acid is an oxidising agent which reacts with reducing agent
D. All of the above are correct

Explanation

To solve the question regarding why sulfuric acid is suitable for making a solution acidic compared to other common mineral acids, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Mineral Acids**:
- Mineral acids are inorganic acids derived from minerals. The common examples include sulfuric acid (H₂SO₄), nitric acid (HNO₃), and hydrochloric acid (HCl).

**Hint**: Recall that mineral acids are typically strong acids and are derived from non-living sources.

2. **Reactivity of Sulfuric Acid with KMnO₄**:
- Sulfuric acid does not react with potassium permanganate (KMnO₄) in a way that would interfere with its use as an acidifying agent. Instead, it can act as a reducing agent when concentrated.

**Hint**: Consider the properties of sulfuric acid as both a strong acid and a reducing agent.

3. **Reactivity of Hydrochloric Acid with KMnO₄**:
- When hydrochloric acid is used with KMnO₄, it reacts to produce chlorine gas (Cl₂). This reaction indicates that HCl can interfere with the oxidizing properties of KMnO₄.

**Hint**: Think about how the presence of chloride ions can affect oxidation reactions.

4. **Reactivity of Nitric Acid with Reducing Agents**:
- Nitric acid (HNO₃) is a strong oxidizing agent. It reacts with reducing agents, which can complicate its use in reactions where a stable acidic environment is needed.

**Hint**: Remember that oxidizing agents tend to react with reducing agents, which can lead to unwanted side reactions.

5. **Conclusion**:
- Since sulfuric acid does not react with KMnO₄ or reducing agents in a way that disrupts its function as an acid, it is deemed suitable for acidifying solutions. In contrast, hydrochloric and nitric acids can lead to reactions that produce gases or other products that complicate the desired outcome.

**Hint**: Summarize the unique properties of sulfuric acid that make it preferable in this context compared to HCl and HNO₃.

### Final Answer:
Sulfuric acid is suitable for making solutions acidic because it does not react with KMnO₄ or reducing agents, unlike hydrochloric acid and nitric acid, which can lead to unwanted reactions.