Statement-1. `CO_(2)` is a gas but `SiO_(2)` is a solid at room temperature.
Statement-2. `CO_(2)` contains `C = O` bonds but `C=O` bonds but `SiO_(2)` has a three-directional network structure.

Options

A. Statement-1 is True, Statement-2 is True , Statement-2 is a correct explanation for statement-1.
B. Statement-1 is True, Statement-2 is True , Statement-2 is not a correct explanation for statement-1.
C. Statement-1 is True, Statement-2 is False.
D. Statement-1 is False, Statement-2 is True.

Answer

To analyze the statements provided in the question, we will break down each statement and evaluate their validity step by step.

### Step 1: Analyze Statement 1
**Statement 1**: "CO₂ is a gas but SiO₂ is a solid at room temperature."

- **Explanation**: Carbon dioxide (CO₂) is a molecular compound that exists as a gas at room temperature due to its low molecular weight and the weak intermolecular forces (Van der Waals forces) between CO₂ molecules. In contrast, silicon dioxide (SiO₂) is a network solid, which means it has a strong three-dimensional covalent bond structure that gives it a high melting point and makes it a solid at room temperature.

**Conclusion for Statement 1**: This statement is true.

### Step 2: Analyze Statement 2
**Statement 2**: "CO₂ contains C=O bonds but SiO₂ has a three-directional network structure."

- **Explanation**: In CO₂, the carbon atom is double-bonded to two oxygen atoms (C=O), which contributes to its molecular nature. The presence of these double bonds allows for a linear molecular geometry. On the other hand, SiO₂ has a tetrahedral structure where each silicon atom is covalently bonded to four oxygen atoms, forming a three-dimensional network. This network structure is responsible for the solid state of SiO₂.

**Conclusion for Statement 2**: This statement is also true.

### Final Conclusion
Both statements are true. Therefore, the overall conclusion is that the first statement about CO₂ being a gas and SiO₂ being a solid is correct, and the second statement about the bonding and structure of CO₂ and SiO₂ is also correct.