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

Options

A. It contains B-B ionic bond
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 B2H6 (diborane), let's analyze each option step by step.

### Step 1: Understanding the Structure of B2H6
B2H6, known as diborane, consists of two boron atoms and six hydrogen atoms. The structure of diborane is unique because it contains both terminal and bridging hydrogen atoms.

**Hint:** Remember that diborane has a specific structure that includes bridging and terminal hydrogen atoms.

### Step 2: Analyzing the Bonding in B2H6
1. **VB Ionic Bond**: The first statement claims that B2H6 consists of VB (Valence Bond) ionic bonds. This is incorrect because B2H6 does not have any ionic bonds; it primarily has covalent bonds formed by the sharing of electrons.

**Hint:** Ionic bonds typically involve the transfer of electrons, while covalent bonds involve sharing. Consider the nature of the bonds in diborane.

### Step 3: Hybridization of Boron Atoms
2. **Hybridization**: The second statement asserts that each boron atom is sp3 hybridized. This is correct because each boron atom in diborane uses one s and three p orbitals to form four sp3 hybrid orbitals. Three of these orbitals bond with hydrogen atoms, while one remains empty to form a bridging bond.

**Hint:** Hybridization involves the mixing of atomic orbitals to form new hybrid orbitals. Check how many orbitals are involved for boron in B2H6.

### Step 4: Types of Hydrogen Bonds
3. **Types of Hydrogen Bonds**: The third statement states that diborane has two types of hydrogen bonds. This is also correct. In B2H6, there are terminal hydrogen atoms (bonded directly to boron) and bridging hydrogen atoms (which connect two boron atoms).

**Hint:** Different types of bonds can exist in a molecule. Identify the types of hydrogen bonds present in diborane.

### Step 5: Evaluating the Options
4. **All of These**: The fourth statement claims that all of the previous statements are correct. Since we have identified that the first statement is incorrect, this option is also incorrect.

**Hint:** When evaluating multiple statements, if one is incorrect, then "all of these" cannot be true.

### Conclusion
The incorrect statement regarding B2H6 is that it contains VB ionic bonds. Therefore, the answer is the first option.

### Final Answer
The incorrect statement for B2H6 is: **It consists of VB ionic bond.**