Statement-1 : In ZnS zinc blende structure `Zn^(2+)` from FCC while alternate tetrahedral voids are occupied by `S^(2-)`.
Statement-2: Positions of `Zn^2+ and S^(2-)` in zinc blende structure are similar.

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.

Explanation

To solve the given question, we need to analyze both statements regarding the zinc blende structure of ZnS.

### Step-by-Step Solution:

1. **Understanding the Zinc Blende Structure**:
- The zinc blende structure (ZnS) is a type of crystal structure where zinc ions (Zn²⁺) and sulfide ions (S²⁻) are arranged in a specific manner.
- In this structure, the S²⁻ ions form a face-centered cubic (FCC) lattice.

2. **Position of Ions**:
- In the FCC structure, the S²⁻ ions occupy the corners and the face centers of the cube.
- The Zn²⁺ ions occupy the tetrahedral voids in the FCC lattice. Specifically, they occupy alternate tetrahedral voids.

3. **Analyzing Statement 1**:
- Statement 1 claims that "In ZnS zinc blende structure Zn²⁺ forms FCC while alternate tetrahedral voids are occupied by S²⁻."
- This statement is incorrect because it incorrectly states that Zn²⁺ forms the FCC structure. In reality, it is the S²⁻ ions that form the FCC structure, while Zn²⁺ occupies the tetrahedral voids.

4. **Analyzing Statement 2**:
- Statement 2 claims that "Positions of Zn²⁺ and S²⁻ in zinc blende structure are similar."
- This statement is also incorrect because the positions of Zn²⁺ ions (which occupy tetrahedral voids) and S²⁻ ions (which occupy FCC lattice points) are not similar.

5. **Conclusion**:
- Both statements are incorrect. Therefore, Statement 2 does not provide a correct explanation for Statement 1.
- The correct answer is that both statements are false.

### Final Answer:
Both Statement 1 and Statement 2 are false.

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