Which of the following oxides shows electrical properties like metals?

Options

A. `SiO_2`
B. MgO
C. `SO_2` (s)
D. `CrO_2`

Explanation

To determine which of the given oxides shows electrical properties similar to metals, we can analyze each option based on their chemical nature and properties.

### Step-by-Step Solution:

1. **Identify the Oxides**: We have four options to consider:
- Silicon oxide (SiO₂)
- Magnesium oxide (MgO)
- Sulphur dioxide (SO₂)
- Chromium oxide (Cr₂O₃)

2. **Analyze Silicon Oxide (SiO₂)**:
- Silicon oxide is a covalent oxide.
- It is an oxide of the metalloid silicon.
- **Conclusion**: SiO₂ does not exhibit metallic electrical properties.

3. **Analyze Magnesium Oxide (MgO)**:
- Magnesium oxide is classified as a basic oxide.
- It is ionic in nature and does not conduct electricity in solid form.
- **Conclusion**: MgO does not exhibit metallic electrical properties.

4. **Analyze Sulphur Dioxide (SO₂)**:
- Sulphur dioxide is also a covalent oxide.
- When dissolved in water, it forms an acidic solution (sulphuric acid).
- **Conclusion**: SO₂ does not exhibit metallic electrical properties.

5. **Analyze Chromium Oxide (Cr₂O₃)**:
- Chromium oxide is a metal oxide.
- It shows metallic conductivity and has a copper-like luster.
- The strong metal-metal bonds and the presence of free electrons contribute to its metallic nature.
- **Conclusion**: Cr₂O₃ exhibits electrical properties similar to metals.

6. **Final Answer**: Based on the analysis, the oxide that shows electrical properties like metals is **Chromium oxide (Cr₂O₃)**.