Statement-1: Inter-stitial carbides are formed when heavy metals react chemically with C(gas).
Statement-2: In such carbides 'C' occupy voids available in heavy metals.

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 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 given in the question, we will break down each statement and evaluate its truthfulness step by step.

### Step 1: Evaluate Statement 1
**Statement 1:** "Inter-stitial carbides are formed when heavy metals react chemically with C(gas)."

- **Analysis:** Interstitial carbides are a specific type of carbide where carbon atoms occupy the interstitial spaces (voids) between the metal atoms in a metallic lattice. This formation does not involve a direct chemical reaction between heavy metals and carbon gas. Instead, carbon atoms fit into the gaps of the metal structure without forming a new compound through a chemical reaction.

- **Conclusion:** This statement is **false**.

### Step 2: Evaluate Statement 2
**Statement 2:** "In such carbides 'C' occupy voids available in heavy metals."

- **Analysis:** In interstitial carbides, carbon atoms indeed occupy the voids or interstitial spaces within the crystal lattice of heavy metals. This is a characteristic feature of interstitial compounds, where smaller atoms (like carbon) fit into the spaces between larger atoms (like those of heavy metals).

- **Conclusion:** This statement is **true**.

### Final Conclusion
Based on the evaluations:
- Statement 1 is **false**.
- Statement 2 is **true**.

Thus, the correct answer is that Statement 1 is false and Statement 2 is true.

### Answer: D (Statement 1 is false, Statement 2 is true)

---