The compound `(s)` which have `-O-O-` bonds `(s)` is`//`are

Options

A. `BaO_(2)`
B. `Na_(2)O_(2)`
C. `CrO_(5)`
D. `Fe_(2)O_(3)`

Explanation

To determine which compounds have the peroxide bond (-O-O-), we will analyze each of the given options one by one.

### Step-by-Step Solution:

1. **Identify the Compounds**: The question provides four compounds:
- A) Barium peroxide (BaO2)
- B) Sodium peroxide (Na2O2)
- C) Chromium oxide peroxide (CrO5)
- D) Ferric oxide (Fe2O3)

2. **Draw Structures**:
- **Barium Peroxide (BaO2)**:
- Barium (Ba) has a +2 charge and is linked to two oxygen atoms, forming a peroxide bond. The structure can be represented as Ba(O-O).
- **Sodium Peroxide (Na2O2)**:
- Sodium (Na) has a +1 charge and forms a bond with the peroxide linkage. The structure is Na-O-O-Na.
- **Chromium Oxide Peroxide (CrO5)**:
- Chromium (Cr) is bonded to four oxygen atoms, with two of them forming a peroxide bond. The structure is Cr=O and O-O.
- **Ferric Oxide (Fe2O3)**:
- Ferric oxide consists of iron (Fe) and oxygen (O) but does not contain a peroxide bond. It is represented as Fe-O-Fe.

3. **Analyze Each Compound**:
- **Barium Peroxide (BaO2)**: Contains the -O-O- bond.
- **Sodium Peroxide (Na2O2)**: Contains the -O-O- bond.
- **Chromium Oxide Peroxide (CrO5)**: Contains the -O-O- bond.
- **Ferric Oxide (Fe2O3)**: Does not contain the -O-O- bond.

4. **Conclusion**:
- The compounds that contain the peroxide bond (-O-O-) are:
- A) Barium peroxide (BaO2)
- B) Sodium peroxide (Na2O2)
- C) Chromium oxide peroxide (CrO5)

### Final Answer:
The compounds which have -O-O- bonds are **A, B, and C** (Barium peroxide, Sodium peroxide, and Chromium oxide peroxide).

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