Which of the following elements of group VA does not show allotropy

Options

A. N
B. Bi
C. P
D. As

Explanation

To determine which element of Group VA (Group 15) does not show allotropy, we can analyze the elements in this group: nitrogen (N), phosphorus (P), arsenic (As), antimony (Sb), and bismuth (Bi).

### Step-by-Step Solution:

1. **Understanding Allotropy**:
- Allotropy refers to the existence of an element in more than one physical form. For example, carbon exists as graphite and diamond.

2. **List the Elements in Group VA**:
- The elements in Group VA are nitrogen (N), phosphorus (P), arsenic (As), antimony (Sb), and bismuth (Bi).

3. **Analyzing Allotropic Forms**:
- **Nitrogen (N)**: Exists as diatomic nitrogen (N2) and has different allotropes under specific conditions (e.g., liquid nitrogen).
- **Phosphorus (P)**: Exists in several allotropes, including white phosphorus, red phosphorus, and black phosphorus.
- **Arsenic (As)**: Has different allotropes, including gray arsenic and yellow arsenic.
- **Antimony (Sb)**: Exhibits allotropy with different forms, such as gray and yellow antimony.
- **Bismuth (Bi)**: Unlike the other elements, bismuth does not have multiple allotropes. It primarily exists in one form.

4. **Conclusion**:
- Among the elements of Group VA, bismuth (Bi) does not show allotropy.

### Final Answer:
Bismuth (Bi) does not show allotropy.

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