Large difference in boiling points is observed in

Options

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

Answer

To solve the question regarding the large difference in boiling points observed in group 15 elements, we can follow these steps:

### Step-by-Step Solution:

1. **Identify Group 15 Elements**:
- The elements in group 15 of the periodic table are Nitrogen (N), Phosphorus (P), Arsenic (As), Antimony (Sb), and Bismuth (Bi).

2. **List Boiling Points**:
- We need to find the boiling points of these elements. The approximate boiling points in Kelvin are:
- Nitrogen (N): 772 K
- Phosphorus (P): 554 K
- Arsenic (As): 888 K
- Antimony (Sb): 1860 K
- Bismuth (Bi): 1837 K

3. **Calculate Differences in Boiling Points**:
- We will calculate the differences in boiling points between adjacent elements:
- N to P: 772 K - 554 K = 218 K
- P to As: 888 K - 554 K = 334 K
- As to Sb: 1860 K - 888 K = 972 K
- Sb to Bi: 1860 K - 1837 K = 23 K

4. **Identify the Largest Difference**:
- From the calculated differences, we can see:
- The difference between Arsenic (As) and Antimony (Sb) is the largest at 972 K.

5. **Conclusion**:
- Therefore, the large difference in boiling points is observed between Arsenic (As) and Antimony (Sb).

### Final Answer:
The large difference in boiling points is observed between Arsenic (As) and Antimony (Sb).

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