Examples of few solids are given below. Find out the example which is not correctly matched.

Options

A. Ionic solids - NaCl, ZnS
B. Covalent solids - `H_2,I_2`
C. Molecular solids - `H_2O_((S))`
D. Metallic solids - Cu,Sn

Explanation

To solve the question of identifying the incorrectly matched solid examples, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Identify the Types of Solids**: We have different categories of solids: ionic solids, covalent solids, molecular solids, and metallic solids.

2. **Evaluate the Given Examples**:
- **Ionic Solids**: NHCl (which is actually NaCl) and ZnS
- **NaCl** (Sodium Chloride) is a well-known ionic solid.
- **ZnS** (Zinc Sulfide) is also an ionic solid.
- **Conclusion**: This match is correct.

- **Covalent Solids**: H2I2
- **H2I2** (Dihydrogen Diodine) is not a covalent solid; it is a molecular compound.
- Covalent solids typically refer to network solids like diamond or silicon carbide.
- **Conclusion**: This match is incorrect.

- **Molecular Solids**: I2O
- **I2O** (Diiodine Monoxide) is not a typical molecular solid; molecular solids are usually composed of discrete molecules held together by intermolecular forces.
- **Conclusion**: This match is also incorrect.

- **Metallic Solids**: Cu and Sn
- **Cu** (Copper) and **Sn** (Tin) are both metallic elements and form metallic solids.
- **Conclusion**: This match is correct.

3. **Identify the Incorrect Match**:
- The incorrect match is found in the covalent solid category where H2I2 is listed. It should not be classified as a covalent solid.

### Final Answer:
The example that is not correctly matched is **H2I2** listed as a covalent solid.

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