With which of the given pairs, `CO_(2)` resembles

Options

A. `HgCl_2,C_2H_2`
B. `HgCl_2,SnCl_4`
C. `C_2H_2,N_2O`
D. `SnCl_4 and NO_2`

Answer

To determine which pair resembles carbon dioxide (CO₂), we need to analyze the molecular structure and hybridization of CO₂ and compare it with the given options.

### Step-by-Step Solution:

1. **Identify the Structure of CO₂:**
- Carbon dioxide (CO₂) has a linear molecular structure.
- The hybridization of the carbon atom in CO₂ is sp, which corresponds to a linear geometry.

2. **Examine the Given Options:**
- We need to analyze each option to see if they also have a linear structure.

3. **Option 1: HgCl₂ and C₂H₂**
- **HgCl₂ (Mercury(II) chloride)**: This molecule is linear due to its sp hybridization.
- **C₂H₂ (Acetylene)**: This molecule is also linear, as it has a triple bond between the two carbon atoms, resulting in an sp hybridization.
- **Conclusion**: Both HgCl₂ and C₂H₂ are linear, so this pair resembles CO₂.

4. **Option 2: HgCl₂ and SnCl₄**
- **HgCl₂**: Linear as established.
- **SnCl₄ (Tin(IV) chloride)**: This molecule has a tetrahedral geometry due to sp³ hybridization.
- **Conclusion**: This pair does not resemble CO₂.

5. **Option 3: C₂H₂ and N₂O**
- **C₂H₂**: Linear as established.
- **N₂O (Nitrous oxide)**: This molecule has a bent structure due to the presence of a lone pair on the nitrogen atom.
- **Conclusion**: This pair does not resemble CO₂.

6. **Option 4: SnCl₄ and another molecule**
- **SnCl₄**: Tetrahedral as established.
- The other molecule is not specified, but since SnCl₄ is tetrahedral, this pair cannot resemble CO₂.
- **Conclusion**: This pair does not resemble CO₂.

### Final Conclusion:
The only pair that resembles CO₂ in terms of linear structure is **Option 1: HgCl₂ and C₂H₂**.

### Answer:
**Option A: HgCl₂ and C₂H₂**