Which of these compounds are directional?

Options

A. `Na Cl`
B. `CO _(2)`
C. `BaO `
D. `CsCl _(2)`

Answer

To determine which of the given compounds are directional, we need to analyze the type of bonding present in each compound. Directional bonds are typically covalent bonds, while ionic bonds are generally non-directional. Let's evaluate each compound step by step.

### Step 1: Identify the compounds and their bonding types

1. **NaCl (Sodium Chloride)**
- Sodium (Na) is a metal and Chlorine (Cl) is a non-metal.
- Sodium donates an electron to Chlorine, forming Na⁺ and Cl⁻ ions.
- **Bond Type:** Ionic Bond (Non-directional)

2. **CO₂ (Carbon Dioxide)**
- Carbon (C) and Oxygen (O) are both non-metals.
- They share electrons to form covalent bonds.
- **Bond Type:** Covalent Bond (Directional)

3. **BaO (Barium Oxide)**
- Barium (Ba) is a metal and Oxygen (O) is a non-metal.
- Barium donates electrons to Oxygen, forming Ba²⁺ and O²⁻ ions.
- **Bond Type:** Ionic Bond (Non-directional)

4. **CaCl₂ (Calcium Chloride)**
- Calcium (Ca) is a metal and Chlorine (Cl) is a non-metal.
- Calcium donates electrons to Chlorine, forming Ca²⁺ and Cl⁻ ions.
- **Bond Type:** Ionic Bond (Non-directional)

5. **CoCl₂ (Cobalt(II) Chloride)**
- Cobalt (Co) is a metal and Chlorine (Cl) is a non-metal.
- Cobalt donates electrons to Chlorine, forming Co²⁺ and Cl⁻ ions.
- **Bond Type:** Ionic Bond (Non-directional)

### Step 2: Conclusion

From the analysis above, we can conclude that:
- **Directional Compounds:** CO₂ (Covalent)
- **Non-Directional Compounds:** NaCl, BaO, CaCl₂, CoCl₂ (Ionic)

### Final Answer:
The only directional compound among the given options is **CO₂**.

---