In Buna-N, 'N' is not slands for

Options

A. Nitrogen
B. Nitrile
C. Nitro
D. Nitrene

Answer

To solve the question "In Buna-N, 'N' does not stand for which of the following: nitrogen, nitrile, nitro, or nitrene?", we can follow these steps:

### Step-by-Step Solution:

1. **Understand what Buna-N is**:
- Buna-N is a type of synthetic rubber, specifically a copolymer made from two monomers: 1,3-butadiene and acrylonitrile.

2. **Identify the components of Buna-N**:
- The two monomers involved in the formation of Buna-N are:
- **1,3-butadiene** (C4H6)
- **Acrylonitrile** (C3H3N)

3. **Analyze the meaning of 'N' in Buna-N**:
- The 'N' in Buna-N is derived from acrylonitrile, which contains a nitrile group (–C≡N). Therefore, it stands for "nitrile".

4. **Evaluate the options**:
- The options given are:
- A) Nitrogen
- B) Nitrile
- C) Nitro
- D) Nitrene
- Since 'N' stands for nitrile, we need to identify which of the other options it does not represent.

5. **Determine the correct answer**:
- **Nitrogen** (A) is a part of the nitrile group.
- **Nitrile** (B) is what 'N' stands for in Buna-N.
- **Nitro** (C) refers to a different functional group (–NO2) and is not related to Buna-N.
- **Nitrene** (D) is a reactive intermediate containing a nitrogen atom with a valence of one, which is also not related to Buna-N.

6. **Conclusion**:
- The correct answer is **C) Nitro**, as 'N' in Buna-N does not stand for nitro.

### Final Answer:
C) Nitro