Assertion Ionic compounds tend to be non-volatile
Reasoning Intermolecular forces in these compounds are weak .

Options

A. If both `(A)` and `(R )` are correct and `(R )` is the correct explanation of `(A)`
B. If both `(A)` and `(R )` are correct and `(R )` is the correct explanation of `(A)`
C. If `(A)` is correct but `(R )` is incorrect
D. If `(A)` is incorrect but `(R )` is correct

Explanation

To solve the question, we need to analyze both the assertion and the reasoning provided.

**Step 1: Analyze the Assertion**
The assertion states that "Ionic compounds tend to be non-volatile."
- Ionic compounds are formed by the electrostatic attraction between positively and negatively charged ions.
- Due to the strong ionic bonds, these compounds have high melting and boiling points, which means they do not easily vaporize at room temperature.
- Therefore, the assertion is **correct**.

**Step 2: Analyze the Reasoning**
The reasoning states that "Intermolecular forces in these compounds are weak."
- In ionic compounds, the forces of attraction between the ions (ionic bonds) are actually very strong, not weak.
- The strong ionic bonds are responsible for the stability and low volatility of ionic compounds.
- Therefore, the reasoning is **incorrect**.

**Conclusion**
- The assertion is correct, but the reasoning is incorrect.

Thus, the final answer is:
- Assertion: Correct
- Reasoning: Incorrect