Phosphorus is a very reactive non - metal . To prevent contact of phosphorus with oxygen, they are stored _______.

Options

A. air
B. water
C. soil
D. kerosene

Answer

To solve the question, we need to consider the properties of phosphorus and how to safely store it to prevent it from reacting with oxygen.

### Step-by-Step Solution:

1. **Identify the Reactivity of Phosphorus**:
- Phosphorus is known to be a very reactive non-metal. It can easily react with oxygen in the air.

2. **Understand the Risk of Exposure to Air**:
- When phosphorus comes into contact with oxygen, it can ignite and catch fire. This makes it crucial to store it in a way that minimizes its exposure to air.

3. **Determine Safe Storage Methods**:
- To prevent phosphorus from reacting with oxygen, it should be stored in an environment that limits its contact with air.

4. **Select the Appropriate Storage Medium**:
- One common method to store reactive substances like phosphorus is to submerge them in water. Water acts as a barrier to oxygen, preventing the phosphorus from coming into contact with it.

5. **Conclude the Answer**:
- Therefore, the correct answer to the question is that phosphorus is stored in water.

### Final Answer:
Phosphorus is stored in **water** to prevent contact with oxygen.

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