Statement-1: `B_(2)H_(6)` on heating with excess of ammonia forms boron nitride.
Statement-2: `B_(2)H_(6)` contain three centre two electron pair bonds.

Options

A. Statement-1 is true, statement-2 is true, statement-2 is a correct explanation for statement-1
B. Statement-1 is true, statement-2 is true, statement-2 is not correct explanation for statement-1
C. Statement-1 is true, statement-2 is false
D. Statement-1 is false, statement-2 is true

Answer

To solve the question, let's analyze both statements step by step.

### Step 1: Analyze Statement 1
**Statement 1:** `B2H6` on heating with excess of ammonia forms boron nitride.

1. **Identify the compound:** `B2H6` is known as diborane.
2. **Reaction with ammonia:** When diborane is heated with ammonia, it reacts to form boron nitride (BN) and hydrogen gas (H2).
3. **Balanced equation:** The balanced chemical equation for this reaction is:
\[ B2H6 + 2NH3 \rightarrow 2BN + 6H2 \]
4. **Conclusion:** Since the reaction does occur as stated, **Statement 1 is true.**

### Step 2: Analyze Statement 2
**Statement 2:** `B2H6` contains three-center two-electron pair bonds.

1. **Understanding the structure of `B2H6`:** Diborane has a unique structure where two boron atoms are bonded to each other and to hydrogen atoms.
2. **Valence electrons:** Each boron atom has three valence electrons, and each hydrogen atom has one.
3. **Bonding in diborane:** In diborane, there are four hydrogen atoms that form bonds with the two boron atoms. The bonding involves:
- Two boron atoms share two electrons with two hydrogen atoms, forming standard two-center two-electron bonds.
- The remaining two hydrogen atoms are involved in three-center two-electron bonds, where two boron atoms and one hydrogen atom share two electrons.
4. **Naming the bond:** These three-center two-electron bonds are also referred to as "banana bonds."
5. **Conclusion:** Since `B2H6` indeed contains three-center two-electron bonds, **Statement 2 is true.**

### Step 3: Determine the relationship between the statements
1. **Both statements are true:** We have established that both Statement 1 and Statement 2 are true.
2. **Explanation relationship:** However, Statement 2 does not explain Statement 1. The formation of boron nitride from diborane does not depend on the presence of three-center two-electron bonds.

### Final Conclusion
Based on the analysis:
- **Statement 1 is true.**
- **Statement 2 is true.**
- **Statement 2 is not a correct explanation for Statement 1.**

Thus, the correct option is **Option B:** Statement 1 is true, Statement 2 is true, and Statement 2 is not the correct explanation for Statement 1.

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