Select the incorrect statement for `B_(2) H_(6)`

Options

A. It contains B- B ionic bonds
B. Each boron is `sp^(3)` hybridised
C. It has two types of hydrogen bonds
D. All of these

Answer

To determine the incorrect statement regarding diborane (B₂H₆), we will analyze the properties and structure of diborane step by step.

### Step 1: Understand the Structure of Diborane (B₂H₆)
Diborane consists of two boron atoms and six hydrogen atoms. The structure can be visualized as follows:

- Each boron atom is bonded to three hydrogen atoms.
- There are two bridging hydrogen atoms that connect the two boron atoms.

### Step 2: Analyze the Bonding in Diborane
In diborane, the bonding involves:
- **Terminal Bonds**: Each boron atom forms two terminal covalent bonds with two hydrogen atoms.
- **Bridge Bonds**: The two boron atoms are connected by two bridging hydrogen atoms, which are not considered as typical covalent bonds but rather as bridge bonds.

### Step 3: Evaluate the Statements
Now, let's evaluate the statements provided:

1. **Statement 1**: "It contains B-B ionic bond."
- **Analysis**: This statement is incorrect because there is no direct B-B bond in diborane. The boron atoms are connected through hydrogen atoms, which act as a bridge. Therefore, this statement is false.

2. **Statement 2**: "Each boron is sp³ hybridized."
- **Analysis**: This statement is correct. Each boron atom undergoes sp³ hybridization due to the presence of four equivalent bonds (three with hydrogen and one bridge bond).

3. **Statement 3**: "It has two types of hydrogen bonds."
- **Analysis**: This statement is correct. Diborane has two types of hydrogen bonding: terminal covalent bonds and bridging hydrogen bonds.

4. **Statement 4**: "All of the above statements are correct."
- **Analysis**: This statement is incorrect because we have already identified that Statement 1 is incorrect.

### Conclusion
The incorrect statement regarding diborane (B₂H₆) is **Statement 1**, which claims that it contains a B-B ionic bond.