Glyptal is a polymer of

Options

A. malonic acid + ethylene glycol
B. phthalic acid + ethylene glycol
C. maleic acid + formaldehyde
D. acetic acid + phenol .

Explanation

To determine the polymer of Glyptal, we need to analyze the options provided and identify the correct monomers that combine to form Glyptal.

### Step-by-Step Solution:

1. **Identify the Monomers**: Glyptal is formed from the reaction of two specific monomers. The two monomers in question are ethylene glycol and phthalic acid.

2. **Chemical Structures**:
- **Ethylene Glycol**: The chemical structure of ethylene glycol is represented as HO-CH2-CH2-OH. It contains two hydroxyl (-OH) groups.
- **Phthalic Acid**: The chemical structure of phthalic acid can be represented as a benzene ring with two carboxylic acid (-COOH) groups attached. Its formula is C6H4(COOH)2.

3. **Polymerization Reaction**: When ethylene glycol reacts with phthalic acid, a condensation polymerization occurs. This reaction leads to the formation of Glyptal, which has the repeating unit derived from these two monomers.

4. **Structure of Glyptal**: The resulting structure of Glyptal can be represented as:
- O-CH2-CH2-O-C(=O)-C(=O)- (where the -C(=O)- represents the carbonyl groups from the phthalic acid).

5. **Conclusion**: Based on the analysis, Glyptal is indeed a polymer formed from the combination of ethylene glycol and phthalic acid.

### Final Answer:
Glyptal is a polymer of **phthalic acid and ethylene glycol**.