Select the incorect statement(s).

Options

A. Alkaline `H_(2)O_(2)` reduces `CIO_(2)` to `CIO_(2)^(-)`
B. Ammonia reacts with excess of iodine to form an explosive, `NI_(3)`. `NH_(3)`
C. The manufacture of `HNO_(3)` is based upon catalytic oxidation of `NH_(3)` by atmospheric oxygen.
D. `N_(2)O_(3)` with concentrated `HCIO_(4)` forms nitrosyl salt.

Explanation

To solve the question of selecting the incorrect statements, we will analyze each statement one by one and determine their validity based on chemical principles and reactions.

### Step-by-Step Solution:

1. **Analyze Statement A**:
- **Statement**: Alkaline H2O2 reduces ClO2 to ClO2-.
- **Reaction**: When hydrogen peroxide (H2O2) is treated with chlorine dioxide (ClO2) in a basic medium, it is expected to reduce ClO2 to chloride ions (Cl-), not ClO2-.
- **Conclusion**: This statement is **incorrect** because H2O2 acts as an oxidizing agent, and the reduction product should be Cl- instead of ClO2-.

2. **Analyze Statement B**:
- **Statement**: Ammonia reacts with excess iodine to form an explosive compound Ni3NH3.
- **Reaction**: The reaction between ammonia (NH3) and iodine (I2) indeed produces an explosive compound known as nitrogen triiodide (NI3) along with ammonium iodide (NH4I).
- **Conclusion**: This statement is **correct**.

3. **Analyze Statement C**:
- **Statement**: The manufacture of HNO3 is based upon the catalytic oxidation of ammonia by atmospheric oxygen.
- **Reaction**: In the Ostwald process, ammonia (NH3) is oxidized to nitrogen monoxide (NO) in the presence of a catalyst (like platinum) and then further oxidized to nitrogen dioxide (NO2), which is then converted to nitric acid (HNO3).
- **Conclusion**: This statement is **correct**.

4. **Analyze Statement D**:
- **Statement**: N2O3 with concentrated HClO4 forms a nitrosyl salt.
- **Reaction**: The reaction of N2O3 with concentrated HClO4 does not yield a nitrosyl salt. Instead, it produces nitric acid (HNO3) and hydrochloric acid (HCl) as products.
- **Conclusion**: This statement is **incorrect**.

### Final Conclusion:
- The incorrect statements are **A** and **D**.