The monomers of Bakelite are

Options

A. Ethylene glycol+phthalic acid
B. Phenol+formaldehyde
C. Ethylene glycol+terephthalic acid
D. Phenol+methanoic acid

Answer

To determine the monomers of Bakelite, we need to identify the correct components that combine to form this polymer. Bakelite is a type of phenolic resin, and its synthesis involves specific monomers.

### Step-by-Step Solution:

1. **Identify the Options**: The question provides four sets of options for the monomers of Bakelite:
- A) Ethylene glycol and terephthalic acid
- B) Phenol and formaldehyde
- C) Ethylene glycol and terephthalic acid (with a typo in the question)
- D) Phenol and methanoic acid

2. **Understanding Bakelite**: Bakelite is a thermosetting plastic that is made from the polymerization of phenol and formaldehyde. It is crucial to note that these two compounds are the primary building blocks of Bakelite.

3. **Analyzing the Monomers**:
- **Phenol (C6H5OH)**: This aromatic compound serves as one of the monomers.
- **Formaldehyde (HCHO)**: This is an aldehyde that reacts with phenol to form the polymer.

4. **Polymerization Process**: The reaction between phenol and formaldehyde involves several steps:
- Initially, phenol reacts with formaldehyde to form a series of intermediate products (like novolac).
- These intermediates can further react to form a cross-linked structure, which is characteristic of Bakelite.

5. **Conclusion**: Based on the analysis, the correct answer is option B: **Phenol and formaldehyde** are the monomers of Bakelite.

### Final Answer:
The monomers of Bakelite are **Phenol and Formaldehyde**.

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