Which of the following are not correctly matched with the bonds found between the constituents particle?

Options

A. Solid `CO_(2)`: Vanderwaal's
B. Graphite: Covalent and Vanderwaal
C. Grey Cast Iron : Inoic
D. Metal alloys: Ions -delocalised electrons

Answer

To determine which of the following options are not correctly matched with the bonds found between the constituent particles, we will analyze each option one by one.

### Step-by-Step Solution:

1. **Option 1: Solid Carbon Dioxide - Van der Waals Forces**
- Solid carbon dioxide (dry ice) consists of CO2 molecules.
- CO2 is a nonpolar molecule because it has a linear structure, and the dipole moments cancel each other out.
- Therefore, the only type of intermolecular force present in solid CO2 is Van der Waals forces (specifically London dispersion forces).
- **Conclusion**: This option is correctly matched.

2. **Option 2: Graphite - Covalent and Van der Waals Forces**
- Graphite is an allotrope of carbon with a layered structure.
- Within each layer, the carbon atoms are bonded together by strong covalent bonds.
- Between the layers, there are weaker Van der Waals forces that allow the layers to slide over each other.
- **Conclusion**: This option is also correctly matched.

3. **Option 3: Gray Cast Iron - Ionic Bonds**
- Gray cast iron is an alloy primarily composed of iron, carbon, and silicon.
- The bonding in gray cast iron is metallic, not ionic.
- Metallic bonds involve a sea of delocalized electrons that allow for conductivity and malleability.
- **Conclusion**: This option is not correctly matched.

4. **Option 4: Metal Alloys - Delocalized Electrons**
- Metal alloys consist of two or more metals mixed together.
- In these alloys, the metal atoms contribute their valence electrons to a "sea of electrons," which are delocalized.
- This delocalization is what gives metals their characteristic properties, such as conductivity and strength.
- **Conclusion**: This option is correctly matched.

### Final Answer:
The option that is not correctly matched with the bonds found between the constituent particles is **Option 3: Gray Cast Iron - Ionic Bonds**.

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