Which of the following molecule has no dative bond?

Options

A. CO
B. `CO_(3)^(2-)`
C. `SO_(4)^(2-)`
D. All of these

Answer

To determine which of the given molecules has no dative bond, we first need to understand what a dative bond is. A dative bond (also known as a coordinate bond) is formed when one atom donates a pair of electrons to another atom that does not contribute any electrons to the bond.

### Step-by-Step Solution:

1. **Understand Dative Bonds**:
- A dative bond occurs when one atom donates a pair of electrons to another atom.
- In a typical covalent bond, both atoms contribute one electron each, but in a dative bond, only one atom provides both electrons.

2. **Identify the Atoms in the Molecules**:
- For the molecules in question, identify the atoms involved and their valence electrons.
- Common examples include carbon (C), oxygen (O), sulfur (S), etc.

3. **Analyze Each Molecule**:
- **Carbon Dioxide (CO₂)**:
- Carbon has 4 valence electrons, and each oxygen has 6 valence electrons.
- In CO₂, carbon forms double bonds with each oxygen, sharing electrons equally. No dative bond is formed.
- **Carbonate Ion (CO₃²⁻)**:
- Carbon has 4 valence electrons, and each oxygen has 6.
- The carbonate ion has resonance structures, and one of the structures involves a dative bond where one oxygen donates a pair of electrons to carbon.
- **Sulfate Ion (SO₄²⁻)**:
- Sulfur has 6 valence electrons, and each oxygen has 6.
- In sulfate, sulfur can form dative bonds with the oxygen atoms, as it can donate electron density to the oxygens.

4. **Conclusion**:
- Among the molecules analyzed, **Carbon Dioxide (CO₂)** is the only molecule that does not have a dative bond.
- Therefore, the answer to the question is **Carbon Dioxide (CO₂)**.

### Final Answer:
The molecule that has no dative bond is **Carbon Dioxide (CO₂)**.