A: Bakelite is hard and has high melting point.
R: Interparticle forces of attraction in it area H-bonding.

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark 1.
B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark 2.
C. If Assertion is true statement but Reason is false, then mark 3.
D. If both Assertion and Reason are false statements the mark 4.

Answer

To solve the question regarding Bakelite, we will analyze the assertion and reason provided, and determine their validity step by step.

### Step 1: Understanding the Assertion
**Assertion (A):** Bakelite is hard and has a high melting point.

- Bakelite is a type of thermosetting polymer, which means that once it is set, it cannot be remolded or reshaped. This property contributes to its hardness and high melting point.
- The structure of Bakelite is a three-dimensional network formed by the polymerization of phenol and formaldehyde. This network structure is responsible for its rigidity and thermal stability.

**Conclusion:** The assertion is true.

### Step 2: Understanding the Reason
**Reason (R):** Interparticle forces of attraction in it are H-bonding.

- Hydrogen bonding typically occurs between molecules that have hydrogen atoms bonded to highly electronegative atoms (like O, N, or F).
- In Bakelite, the polymer chains are cross-linked through methylene (–CH2–) bridges. The presence of these CH2 groups creates steric hindrance, which prevents the formation of hydrogen bonds.
- Instead of hydrogen bonding, Bakelite's strength and stability come from the covalent bonds and the three-dimensional network structure.

**Conclusion:** The reason is false.

### Step 3: Final Evaluation
- Since the assertion is true and the reason is false, we can conclude that the correct answer corresponds to the option stating that the assertion is true and the reason is false.

### Answer:
The correct answer is option number three: Assertion is true, but the reason is false.

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