Assertion : When two gaseous OF molecules are allowed to cool, than they undergoes dimerisation through O-atom.
Reason : Dimer form of OF molecule (i.e., `O_(2)F_(2)`) is having one peroxy linkage in its structure.

Options

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

Answer

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

### Step 1: Understanding the Assertion
The assertion states that when two gaseous OF (oxygen difluoride) molecules are allowed to cool, they undergo dimerization through an oxygen atom.

- **Explanation**: Dimerization is a process where two molecules combine to form a larger molecule. In this case, two OF molecules can combine to form O2F2 (dioxide difluoride) when cooled.

### Step 2: Understanding the Reason
The reason states that the dimer form of the OF molecule (O2F2) contains one peroxy linkage in its structure.

- **Explanation**: A peroxy linkage refers to a bond between two oxygen atoms, typically represented as -O-O-. In the case of O2F2, we need to examine its structure to determine if such a linkage exists.

### Step 3: Analyzing the Structure of O2F2
The structure of O2F2 can be compared to that of hydrogen peroxide (H2O2), which does have a peroxy linkage. However, O2F2 has a different arrangement.

- **Structure**: The structure of O2F2 is not like H2O2 in terms of having a peroxy linkage. Instead, it has a more open structure with fluorine atoms bonded to oxygen atoms, and there is no -O-O- bond present.

### Conclusion
- **Assertion**: True - The dimerization of OF to form O2F2 does occur when cooled.
- **Reason**: False - O2F2 does not have a peroxy linkage in its structure.

Therefore, the correct answer is that the assertion is true, but the reason is false.

### Final Answer
Assertion is true, but the reason is false.

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