Which of the following substance possess antiferromagnetic property

Options

A. `Fe_(3)O_(4)`
B. `CrO_(2)`
C. `H_(2)O`
D. MnO

Explanation

To determine which substance possesses antiferromagnetic properties, we need to understand the characteristics of antiferromagnetism.

### Step-by-Step Solution:

1. **Definition of Antiferromagnetism**:
- Antiferromagnetic materials are characterized by the alignment of magnetic moments in opposite directions, resulting in a net magnetic moment of zero. This occurs due to the equal and opposite alignment of adjacent magnetic dipoles.

2. **Identifying the Options**:
- Let's consider the options provided (though not explicitly listed in the question, we will assume common candidates for antiferromagnetic materials). Common examples include:
- MnO (Manganese Oxide)
- FeO (Iron(II) Oxide)
- NiO (Nickel Oxide)
- CoO (Cobalt(II) Oxide)

3. **Analyzing Each Option**:
- **MnO**: Manganese oxide is known to exhibit antiferromagnetic properties due to the arrangement of manganese ions.
- **FeO**: Iron(II) oxide also shows antiferromagnetism.
- **NiO**: Nickel oxide is another example of an antiferromagnetic material.
- **CoO**: Cobalt(II) oxide is also known to exhibit antiferromagnetic behavior.

4. **Conclusion**:
- Among the options, all of them are known to exhibit antiferromagnetic properties. However, if we are to select one specific example, **MnO** is often highlighted as a classic example of an antiferromagnetic material.

### Final Answer:
- The substance that possesses antiferromagnetic property is **MnO**.