Lactic acid and glycolic acid are the monomers used for preparation of polymer

Options

A. nylon - 2 - nylon - 6
B. dextron
C. PHBV
D. buna - N

Answer

To solve the question regarding the monomers lactic acid and glycolic acid and their use in the preparation of a polymer, we can follow these steps:

### Step 1: Identify the Monomers
Lactic acid and glycolic acid are the two monomers we are considering.

- **Lactic Acid**: The chemical structure of lactic acid is CH3-CHOH-COOH.
- **Glycolic Acid**: The chemical structure of glycolic acid is HO-CH2-COOH.

### Step 2: Determine the Polymer
Both lactic acid and glycolic acid can be used to form a polymer known as polylactic acid (PLA) or polyglycolic acid (PGA). However, when they are combined, they can also form a copolymer.

### Step 3: Write the Reaction
The reaction involves the condensation of lactic acid and glycolic acid, where water is eliminated as a byproduct. The general reaction can be represented as:

\[ \text{Lactic Acid} + \text{Glycolic Acid} \rightarrow \text{Polymer} + \text{H}_2\text{O} \]

### Step 4: Identify the Correct Option
From the options provided (A, B, C, D), we need to choose the correct polymer formed from the combination of lactic acid and glycolic acid. The correct polymer is typically polylactic acid (PLA) or polyglycolic acid (PGA), or a copolymer of both.

### Conclusion
After analyzing the options, we find that the correct answer is the polymer formed from lactic acid and glycolic acid, which is commonly known as polylactic acid or a copolymer of lactic and glycolic acid.