Which is mismatched ?

Options

A. halogens- group 17
B. Chalcogens-group 16
C. Pnictogens - group 14
D. Noble gases - group 18

Answer

To determine which option is mismatched in the context of p-block elements, we will analyze each group and its corresponding family.

### Step-by-Step Solution:

1. **Identify the Groups and Their Families**:
- **Group 13**: Known as the Boron family.
- **Group 14**: Known as the Carbon family (or Crystallogens).
- **Group 15**: Known as the Nitrogen family (or Pnictogens).
- **Group 16**: Known as the Oxygen family (or Chalcogens).
- **Group 17**: Known as the Halogen family.
- **Group 18**: Known as the Noble gases (or Inert gases).

2. **Analyze Each Option**:
- **Option 1**: Group 17 - Halogens (Correct)
- **Option 2**: Group 16 - Chalcogens (Correct)
- **Option 3**: Group 15 - Pnictogens (Incorrectly stated as Nitrogen family)
- **Option 4**: Group 18 - Noble gases (Correct)

3. **Identify the Mismatched Option**:
- The only option that is mismatched is **Option 3**, which incorrectly associates Group 15 with Pnictogens instead of Nitrogen family.

4. **Conclusion**:
- The mismatched option is **Option 3**.

### Final Answer:
The mismatched option is **Option 3** (Group 15 - Pnictogens).