Potassium metal should be stored in:

Options

A. kerosene oil
B. alcohol
C. water
D. bydrochloric acid

Explanation

**Step-by-step Solution:**

1. **Identify the Reactivity of Potassium:**
- Potassium (K) is a highly reactive metal. It readily reacts with oxygen in the air and water.

2. **Understand the Reactions:**
- When potassium is exposed to air, it reacts with oxygen to form potassium oxide. This reaction is exothermic, meaning it releases heat and can be vigorous, potentially leading to explosions.
- When potassium comes into contact with water, it reacts to form potassium hydroxide and hydrogen gas, which can also be explosive due to the heat generated.

3. **Determine Safe Storage Conditions:**
- Given its high reactivity with both air and water, potassium cannot be stored in these environments.
- Other substances like alcohol or acids are also reactive with potassium.

4. **Identify the Suitable Storage Medium:**
- The only safe option for storing potassium is kerosene oil. Kerosene is non-reactive with potassium, providing a safe environment for storage.

5. **Conclude the Answer:**
- Therefore, potassium metal should be stored in kerosene oil.

**Final Answer: Potassium metal should be stored in kerosene oil.**

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