Assertion : `O_(3)` has higher boiling point than O2.
Reason : `O_(3)` is allotrope of oxygen.

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 asertion and reason are false.

Explanation

To solve the question regarding the assertion and reason about the boiling points of O3 and O2, we will follow these steps:

### Step 1: Analyze the Assertion
The assertion states that O3 (ozone) has a higher boiling point than O2 (dioxygen). To evaluate this, we need to consider the molecular masses of both substances.

**Molecular Mass Calculation:**
- O2: The molecular mass of O2 is approximately 32 g/mol (16 g/mol for each oxygen atom).
- O3: The molecular mass of O3 is approximately 48 g/mol (16 g/mol for each oxygen atom, multiplied by 3).

Since O3 has a higher molecular mass than O2, we can conclude that O3 will have a higher boiling point due to the correlation between molecular mass and boiling point.

**Conclusion for Step 1:**
The assertion is true.

### Step 2: Analyze the Reason
The reason states that O3 is an allotrope of oxygen. Allotropes are different forms of the same element in the same physical state. Ozone (O3) is indeed an allotrope of oxygen, while O2 is the diatomic form.

**Conclusion for Step 2:**
The reason is true.

### Step 3: Determine the Relationship Between Assertion and Reason
While both the assertion and the reason are true, we need to evaluate whether the reason correctly explains the assertion. The assertion's explanation lies in the molecular mass difference, not merely in the fact that O3 is an allotrope.

**Conclusion for Step 3:**
The reason does not correctly explain the assertion.

### Final Conclusion
- **Assertion:** True
- **Reason:** True, but does not explain the assertion.

### Answer Selection
Based on the analysis, the correct option is that both the assertion and reason are true, but the reason is not the correct explanation for the assertion.

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