When a large amount of `KMnO_4` is added to concentrated , `H_2SO_4` an explosive compound is. Formed . The formula of the compound is

Options

A. `Mn_2O_7`
B. `Mn_3O_4`
C. `MnO_3`
D. `MnO_3^+`

Answer

To find the formula of the explosive compound formed when a large amount of KMnO4 is added to concentrated H2SO4, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**: The reactants in this reaction are potassium permanganate (KMnO4) and concentrated sulfuric acid (H2SO4).

2. **Understand the Reaction**: When KMnO4 reacts with concentrated H2SO4, it undergoes a redox reaction. KMnO4 acts as an oxidizing agent.

3. **Products of the Reaction**: The main products of this reaction are potassium sulfate (K2SO4), manganese(VII) oxide (Mn2O7), and water (H2O). The reaction can be summarized as:
\[ 2 KMnO_4 + 3 H_2SO_4 \rightarrow K_2SO_4 + Mn_2O_7 + 3 H_2O \]

4. **Identify the Explosive Compound**: Among the products, Mn2O7 (manganese(VII) oxide) is known to be an explosive compound. It is a greenish oily liquid that can be very reactive.

5. **Conclusion**: Therefore, the formula of the explosive compound formed is Mn2O7.

### Final Answer:
The formula of the explosive compound formed is **Mn2O7**.

---