Metals like potassium and sodium react vigorously with oxygen and can catch fire if exposed to air. Keeping them immersed in kerosene oil prevents accidental fires and protects them from reacting with atmospheric oxygen.
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Potassium and sodium, being highly reactive alkali metals, react vigorously with oxygen and moisture in the air. To prevent their exposure to these elements, potassium and sodium are kept immersed in kerosene oil. Kerosene creates a protective layer, preventing contact with atmospheric oxygen and water vapor. If exposed, these metals can undergo rapid oxidation and react violently, sometimes leading to combustion or explosion. By storing them in kerosene, a non-reactive hydrocarbon liquid, the metals remain isolated from the air, ensuring their stability and safety for handling and storage in laboratory or industrial settings.