Assertion : Teflon has high thermal stability and quantuin number. chemical inertness.
Reason : Teflon is a thermoplastic.

Options

A. a. if both assertion and reason are true and reason is thr correct explanation of assertion
B. b. If both assertion and reason are true but reason is not the correct explanation of assertion
C. c. If assertion is true but reason is false
D. d. If both assertion and reson are false.

Explanation

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

**Assertion:** Teflon has high thermal stability and chemical inertness.
**Reason:** Teflon is a thermoplastic.

### Step-by-Step Solution:

1. **Understanding Teflon:**
- Teflon is the common name for polytetrafluoroethylene (PTFE), a polymer made from tetrafluoroethylene.
- It is known for its non-stick properties and is widely used in cookware.

**Hint:** Teflon is a polymer with unique properties due to its chemical structure.

2. **Evaluating the Assertion:**
- Teflon indeed has high thermal stability due to the strong carbon-fluorine (C-F) bonds and carbon-carbon (C-C) bonds in its structure.
- The bond dissociation energy of these bonds is high, contributing to its thermal stability and chemical inertness.

**Hint:** Consider the strength of the bonds in Teflon and how they contribute to its stability.

3. **Evaluating the Reason:**
- The reason states that Teflon is a thermoplastic. Thermoplastics are materials that become soft when heated and harden upon cooling.
- Teflon does exhibit thermoplastic behavior, as it can be molded when heated and retains its shape when cooled.

**Hint:** Think about the properties of thermoplastics and how Teflon fits into this category.

4. **Determining the Relationship:**
- Both the assertion and reason are true.
- However, the reason does not directly explain the assertion. While Teflon being a thermoplastic is true, it does not specifically account for its high thermal stability and chemical inertness.

**Hint:** Analyze whether the reason provides a direct explanation for the assertion.

5. **Conclusion:**
- Since both the assertion and reason are true, but the reason does not explain the assertion, the correct conclusion is that both statements are true, but the reason is not a correct explanation for the assertion.

### Final Answer:
The correct option is that both assertion and reason are true, but the reason is not a correct explanation of the assertion.

### Summary of Options:
- A: Both assertion and reason are true, and reason is a correct explanation of assertion. (False)
- B: Both assertion and reason are true, but reason is not a correct explanation of assertion. (True)
- C: Assertion is true, but reason is false. (False)
- D: Both assertion and reason are false. (False)

**Correct Option:** B