Which of the following set of polymers contains same monomer which is used to prepare urotropine on reaction with `NH_(3)`?

Options

A. Glyptal, urea -formaldehyde resin, Nylon-6,6
B. Glyptal, urea-formaldehyde resin, melamine-formaldehyde resin
C. Nylon-6, urea formaldehyde resin, melamine-formaldehyde resin
D. Nylon-6, glyptal, Nylon-6,6

Answer

To solve the question regarding which set of polymers contains the same monomer used to prepare urotropine upon reaction with ammonia (NH₃), we can follow these steps:

### Step 1: Understand Urotropine Formation
Urotropine, also known as hexamethylene tetramine, is formed by the reaction of formaldehyde (HCHO) with ammonia (NH₃). The reaction can be summarized as follows:
- **Reactants**: Formaldehyde + Ammonia
- **Product**: Urotropine (C₆H₁₂N₄)

### Step 2: Identify the Monomer
From the reaction, we can identify that the key monomer involved in the formation of urotropine is **formaldehyde** (HCHO).

### Step 3: Analyze the Given Options
We need to look for polymers that are synthesized using formaldehyde as a monomer. The options provided are:
- A) Nylon 66
- B) Melamine formaldehyde resin, Urea formaldehyde resin
- C) Nylon 6
- D) Glyptal

### Step 4: Evaluate Each Option
- **Nylon 66**: This polymer is made from hexamethylenediamine and adipic acid, which do not involve formaldehyde.
- **Melamine formaldehyde resin**: This polymer is synthesized using melamine and formaldehyde, thus containing formaldehyde.
- **Urea formaldehyde resin**: This polymer is synthesized using urea and formaldehyde, thus also containing formaldehyde.
- **Nylon 6**: This polymer is made from caprolactam, which does not involve formaldehyde.
- **Glyptal**: This polymer is made from ethylene glycol and phthalic acid, which do not involve formaldehyde.

### Step 5: Conclusion
The correct answer is **Option B** (Melamine formaldehyde resin and Urea formaldehyde resin) as both of these polymers contain formaldehyde, which is the monomer used to prepare urotropine.

### Final Answer:
**Option B: Melamine formaldehyde resin, Urea formaldehyde resin**

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