A : In molecular solids the lattice points are occupied by the atoms or molecules.
R : Molecular solids are generally sublime.

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion then mark (1)
B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
C. If Assertion is true statement but Reason is false then mark (3)
D. If both Assertion and Reason are false statements, then mark (4)

Answer

To solve the question, we need to analyze both the assertion (A) and the reason (R) provided.

### Step 1: Analyze the Assertion (A)
The assertion states: "In molecular solids, the lattice points are occupied by the atoms or molecules."

**Explanation**:
- Molecular solids are indeed composed of molecules (or atoms in some cases) that occupy the lattice points in the crystal structure.
- Unlike ionic solids, which consist of ions at their lattice points, molecular solids consist of discrete molecules held together by intermolecular forces.

**Conclusion**: The assertion is **True**.

### Step 2: Analyze the Reason (R)
The reason states: "Molecular solids are generally sublime."

**Explanation**:
- Sublimation is the process where a solid turns directly into a gas without passing through the liquid state.
- Molecular solids often have weak intermolecular forces (like Van der Waals forces), which allows them to transition from solid to gas easily at relatively low temperatures.
- This characteristic is common in substances like dry ice (solid CO2) and iodine, which can sublime under normal atmospheric conditions.

**Conclusion**: The reason is also **True**.

### Step 3: Determine the Relationship Between A and R
Now we need to determine if the reason correctly explains the assertion.

- While both statements are true, the reason provided does not directly explain why the lattice points in molecular solids are occupied by atoms or molecules. The assertion is about the composition of molecular solids, while the reason discusses their sublimation behavior due to weak intermolecular forces.

### Final Conclusion
Both the assertion and reason are true, but the reason does not correctly explain the assertion. Therefore, the correct answer to the question is that both statements are true, but the reason is not the correct explanation of the assertion.

### Answer
The correct option is that both A and R are true, but R is not the correct explanation of A.

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