Which of the following statements about liquid nitrogen is true

Options

A. It is unreactive
B. It is used in cryosurgery
C. It does not decomposes organic compounds
D. It is very stable

Explanation

To determine which statement about liquid nitrogen is true, we will analyze each of the provided statements one by one.

### Step 1: Analyze the statements

1. **It is unreactive.**
- Liquid nitrogen is indeed unreactive under normal conditions. However, this statement alone does not provide specific information about its applications or properties.

2. **It is used in cryo-surgery.**
- Liquid nitrogen is widely used in cryo-surgery, a medical procedure that involves freezing and destroying abnormal tissues, such as cancerous cells and skin lesions. This statement is true.

3. **It is not decomposed organic compound.**
- Liquid nitrogen is not an organic compound; it is an inorganic compound (N2 in liquid form). However, the phrasing of this statement is misleading because it suggests that it is an organic compound that does not decompose, which is not relevant to nitrogen.

4. **It is stable.**
- While nitrogen is generally stable, this statement does not specifically highlight the unique properties or uses of liquid nitrogen.

### Step 2: Conclusion
After analyzing all the statements, the only true statement regarding liquid nitrogen is:

**Liquid nitrogen is used in cryo-surgery.**

### Final Answer:
The correct statement about liquid nitrogen is: **It is used in cryo-surgery.**

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