Which of the following given list has molecular solids only?

Options

A. Carborundum, dry ice, diamond, solid `H_2`, benzene
B. Naphthalene, `Na_2 SO_4` copper, corundum, `C Cl_4`
C. Corundum, camphor, silicon carbide, ice, solid `CS_2`
D. Solid `H_2`, camphor, dry ice, `solid CS_2`, naphthalene

Answer

To determine which of the given lists contains only molecular solids, we need to analyze each option provided and identify the type of solid each compound represents.

### Step-by-Step Solution:

1. **Identify the Types of Solids:**
- Molecular solids are composed of molecules held together by intermolecular forces (e.g., van der Waals forces, hydrogen bonds).
- Covalent network solids consist of atoms connected by covalent bonds in a continuous network (e.g., diamond, silicon carbide).
- Ionic solids are composed of ions held together by ionic bonds (e.g., Na2SO4).
- Metallic solids consist of metal atoms held together by metallic bonds.

2. **Analyze Each Option:**
- **Option 1: Carborundum (SiC), Dry Ice (CO2), Diamond (C), Solid H2, Benzene (C6H6)**
- Carborundum (SiC) is a covalent network solid.
- Dry Ice (CO2) is a molecular solid.
- Diamond (C) is a covalent network solid.
- Solid H2 is a molecular solid.
- Benzene (C6H6) is a molecular solid.
- **Conclusion:** This option contains both molecular and covalent network solids. Not all are molecular solids.

- **Option 2: Naphthalene (C10H8), Na2SO4, Copper (Cu)**
- Naphthalene is a molecular solid.
- Na2SO4 is an ionic solid.
- Copper is a metallic solid.
- **Conclusion:** This option contains only one molecular solid.

- **Option 3: Camphor (C10H16O), Silicon Carbide (SiC), Ice (H2O), Corundum (Al2O3)**
- Camphor is a molecular solid.
- Silicon Carbide (SiC) is a covalent network solid.
- Ice (H2O) is a molecular solid.
- Corundum (Al2O3) is a covalent network solid.
- **Conclusion:** This option contains both molecular and covalent network solids.

- **Option 4: Solid H2, Camphor (C10H16O), Dry Ice (CO2), Solid CH2**
- Solid H2 is a molecular solid.
- Camphor is a molecular solid.
- Dry Ice (CO2) is a molecular solid.
- Solid CH2 (assuming this refers to a molecular form of hydrocarbons) is also a molecular solid.
- **Conclusion:** This option contains only molecular solids.

3. **Final Answer:**
- The option that contains only molecular solids is **Option 4: Solid H2, Camphor, Dry Ice, Solid CH2**.