ZnS is-

Options

A. Ionic crystal
B. Covalent crystal
C. Metallic crystal
D. Vander Waals' crystal

Answer

To determine what type of crystal ZnS (Zinc Sulfide) is, we can analyze its structure and bonding characteristics step by step.

### Step-by-Step Solution:

1. **Identify the Composition of ZnS**:
- ZnS is composed of zinc (Zn) and sulfur (S) atoms. Zinc typically forms a cation (Zn²⁺), and sulfur forms an anion (S²⁻).

2. **Determine the Nature of Bonding**:
- In ZnS, zinc donates two electrons to sulfur, resulting in the formation of a positively charged zinc ion (Zn²⁺) and a negatively charged sulfide ion (S²⁻). This transfer of electrons indicates ionic bonding.

3. **Classify the Crystal Type**:
- Ionic crystals are characterized by the presence of oppositely charged ions held together by strong electrostatic forces of attraction. Since ZnS consists of Zn²⁺ and S²⁻ ions, it fits the definition of an ionic crystal.

4. **Conclusion**:
- Based on the analysis, ZnS is classified as an ionic crystal due to the presence of cations and anions formed through ionic bonding.

### Final Answer:
ZnS is an **ionic crystal**.

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