The correct statement about `B_2H_6` is:

Options

A. Terminal B-H bonds have less p-character when compared to briging bonds
B. The two B-H-B bonds are not of same length
C. All B-H-B angles are of `120^@`
D. Its fragment ,`BH_3`, behaves as a Lewis base

Answer

To determine the correct statement about diborane (B₂H₆), we will analyze each of the provided statements step by step.

### Step 1: Analyze the first statement
**Statement:** "BH3 is a Lewis base."

**Analysis:**
- A Lewis base is defined as a species that donates an electron pair.
- BH3 (borane) has an incomplete octet (it has only 6 electrons around boron), which makes it electron-deficient.
- Therefore, BH3 acts as a Lewis acid, not a base, because it can accept an electron pair.

**Conclusion:** This statement is incorrect.

### Step 2: Analyze the second statement
**Statement:** "All B-H bond angles are equal to 120 degrees."

**Analysis:**
- In diborane, there are two types of B-H bonds: terminal B-H bonds and bridging B-H bonds.
- The terminal B-H bond angles are approximately 97 degrees, while the bridging B-H bond angles are around 83 degrees.
- Since the bond angles are not all equal to 120 degrees, this statement is also incorrect.

**Conclusion:** This statement is incorrect.

### Step 3: Analyze the third statement
**Statement:** "All B-H bond lengths are the same."

**Analysis:**
- In diborane, the terminal B-H bonds and the bridging B-H bonds have different bond orders.
- The terminal B-H bonds are stronger (higher bond order) than the bridging B-H bonds, leading to different bond lengths.
- Therefore, the bond lengths cannot be the same.

**Conclusion:** This statement is incorrect.

### Step 4: Analyze the fourth statement
**Statement:** "Terminal hydrogen has less p-character than the bridge."

**Analysis:**
- The bond angles in diborane indicate the hybridization of the bonds.
- The bridging B-H bond has a bond angle of approximately 83 degrees, indicating more s-character and less p-character.
- The terminal B-H bond has a bond angle of approximately 97 degrees, indicating more p-character and less s-character.
- Since the terminal bond has a larger bond angle, it has less s-character and more p-character compared to the bridging bond.

**Conclusion:** This statement is correct.

### Final Answer
The correct statement about B₂H₆ is: "Terminal hydrogen has less p-character than the bridge."

---