Assertion : Xe-atom in `XeF_(2)` assumes sp-hybrid state.
Reason : `XeF_(2)` molecule does not follow octet rule.

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 but reason is not the correct explanation of assertion

Answer

To analyze the assertion and reason provided in the question, we will break down the information step by step.

### Step 1: Understanding the Assertion
The assertion states that the Xe atom in \(XeF_2\) assumes an sp-hybrid state.

- **Hybridization** is determined by the steric number, which is the sum of the number of sigma bonds and lone pairs around the central atom.
- In \(XeF_2\), xenon (Xe) is the central atom bonded to two fluorine (F) atoms.

### Step 2: Calculating the Steric Number
To find the steric number for xenon in \(XeF_2\):

- **Bond Pairs**: There are 2 bond pairs (due to the two Xe-F bonds).
- **Lone Pairs**: Xenon has 4 valence electrons and forms 2 bonds with fluorine, leaving it with 3 lone pairs.

Now, we calculate the steric number:
\[ \text{Steric Number} = \text{Number of Bond Pairs} + \text{Number of Lone Pairs} = 2 + 3 = 5 \]

### Step 3: Determining Hybridization
The hybridization corresponding to a steric number of 5 is **sp³d**, not sp.

- Therefore, the assertion that Xe assumes an sp-hybrid state is **false**.

### Step 4: Understanding the Reason
The reason states that the \(XeF_2\) molecule does not follow the octet rule.

- The octet rule states that atoms tend to form compounds in ways that give them eight valence electrons.
- In \(XeF_2\), xenon has 2 bond pairs and 3 lone pairs, leading to a total of 10 electrons around xenon (6 from lone pairs and 4 from bond pairs).

### Step 5: Conclusion
Since \(XeF_2\) has 10 electrons around xenon, it does not follow the octet rule, which makes the reason **true**.

### Final Evaluation
- **Assertion**: False (Xe is sp³d hybridized, not sp).
- **Reason**: True (XeF₂ does not follow the octet rule).

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