Which statement is not correct?

Options

A. Rate of an exothermic reaction increases with temperature.
B. Solubility of `NaOH` increases with temperature.
C. `K_(p)` for `N_(2)(g)+3H_(2)(g)hArr 2NH_(3)(g)` increases with increase in pressure.
D. For gaseous reaction `2BhArr AK_(p)` is smaller than `K_(c)`.

Answer

To determine which statement is not correct regarding compounds that can act as both oxidizing and reducing agents, we can analyze the properties of hydrogen peroxide (H2O2) as an example.

### Step-by-Step Solution:

1. **Understanding Oxidizing and Reducing Agents**:
- An **oxidizing agent** is a substance that gains electrons and is reduced in a chemical reaction.
- A **reducing agent** is a substance that loses electrons and is oxidized in a chemical reaction.

2. **Identifying H2O2**:
- Hydrogen peroxide (H2O2) is a compound that can act as both an oxidizing agent and a reducing agent.
- In H2O2, the oxidation state of oxygen is -1.

3. **Oxidizing Behavior of H2O2**:
- H2O2 can act as an oxidizing agent when it is reduced to O2 (where the oxidation state of oxygen becomes 0). In this process, H2O2 gains electrons.

4. **Reducing Behavior of H2O2**:
- H2O2 can also act as a reducing agent when it is oxidized to water (H2O), where the oxidation state of oxygen becomes -2. In this case, H2O2 loses electrons.

5. **Conclusion**:
- Since H2O2 can undergo both oxidation and reduction, it can function as both an oxidizing and reducing agent. Therefore, any statement claiming that H2O2 cannot act as one of these agents would be incorrect.

### Final Answer:
The statement that is not correct is any claim that H2O2 cannot act as both an oxidizing and reducing agent.