Assertion : Bond energy and bond dissociation energy have identical value for diatomic molecules.
Reason : Greater the bond dissociation energy, less reactive is the bond.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion
B. If both assertion and reason are true but reason is not the correct explanation of assertion
C. If assertion is true but reason is false
D. If both assertion and reason are false.

Explanation

To solve the question, we need to analyze the assertion and the reason provided.

### Step 1: Understanding Bond Energy and Bond Dissociation Energy
- **Bond Energy**: This is the average energy required to break one mole of bonds in a gaseous substance. It is an average value for a specific type of bond across different molecules.
- **Bond Dissociation Energy**: This is the energy required to break a specific bond in a molecule, resulting in the formation of two separate atoms or molecules. For diatomic molecules, this value is specific and does not average over different types of bonds.

**Hint**: Remember that bond energy is an average value, while bond dissociation energy is specific to a particular bond.

### Step 2: Analyzing the Assertion
The assertion states that bond energy and bond dissociation energy have identical values for diatomic molecules. This is true because, in diatomic molecules, there is only one type of bond, so the average bond energy equals the bond dissociation energy.

**Hint**: Consider how diatomic molecules consist of only two atoms and thus have a single bond type.

### Step 3: Analyzing the Reason
The reason states that greater bond dissociation energy means less reactive the bond is. This is also true because a bond with high dissociation energy is stronger and requires more energy to break, making it less likely to react with other substances.

**Hint**: Think about how stronger bonds (higher energy) are less likely to break and thus less reactive.

### Step 4: Evaluating the Relationship Between Assertion and Reason
While both the assertion and the reason are true, the reason does not explain the assertion. The assertion is about the equality of bond energy and bond dissociation energy for diatomic molecules, while the reason discusses bond stability and reactivity.

**Hint**: Assess whether the reason logically supports the assertion. In this case, it does not.

### Conclusion
Both the assertion and the reason are true, but the reason is not the correct explanation for the assertion. Therefore, the correct answer is that both statements are true, but the reason is not the correct explanation for the assertion.

**Final Answer**: Both assertion and reason are true, but the reason is not the correct explanation for the assertion.