The hybrid states of central atom in diborane, diamond and graphite are respectively :-

Options

A. `sp^(2),sp^(3),sp^(2)`
B. `sp^(3),sp^(3),sp^(2)`
C. `sp^(3),sp^(3),sp^(2)`
D. `sp,sp^(2),sp^(3)`

Answer

To determine the hybrid states of the central atom in diborane, diamond, and graphite, we will analyze each compound step by step.

### Step 1: Analyze Diborane (B2H6)
1. **Identify the Structure**: Diborane has the formula B2H6. It consists of two boron atoms and six hydrogen atoms.
2. **Bonding Type**: The bonding in diborane is characterized by 3-center 2-electron bonds. This means that two boron atoms share electrons with three hydrogen atoms in a unique bonding arrangement.
3. **Geometry**: The geometry around each boron atom is tetrahedral due to the presence of four bonding pairs (two B-H bonds and two bridge bonds).
4. **Hybridization**: For tetrahedral geometry, the hybridization state is sp3.

### Conclusion for Diborane:
- **Hybridization**: sp3

### Step 2: Analyze Diamond
1. **Identify the Structure**: Diamond is an allotrope of carbon.
2. **Bonding Type**: In diamond, each carbon atom is bonded to four other carbon atoms.
3. **Geometry**: The arrangement of carbon atoms in diamond is also tetrahedral.
4. **Hybridization**: Similar to diborane, the hybridization for tetrahedral geometry is sp3.

### Conclusion for Diamond:
- **Hybridization**: sp3

### Step 3: Analyze Graphite
1. **Identify the Structure**: Graphite consists of layers of hexagonal rings made up of carbon atoms.
2. **Bonding Type**: Each carbon atom in graphite is bonded to three other carbon atoms in the same plane, forming a hexagonal structure.
3. **Geometry**: The geometry around each carbon atom in the hexagonal plane is trigonal planar.
4. **Hybridization**: For trigonal planar geometry, the hybridization state is sp2.

### Conclusion for Graphite:
- **Hybridization**: sp2

### Final Summary:
- **Diborane**: sp3
- **Diamond**: sp3
- **Graphite**: sp2

### Final Answer:
The hybrid states of the central atom in diborane, diamond, and graphite are respectively: **sp3, sp3, sp2**.

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