Why is sodium kept immersed in kerosene oil?

Sodium, a highly reactive metal, is stored immersed in kerosene oil to prevent rapid oxidation and violent reactions with air and moisture. Exposed sodium reacts vigorously, forming sodium oxide and hydroxide, and may ignite spontaneously. Kerosene oil forms a protective barrier, isolating sodium from atmospheric oxygen and water vapor. This prevents oxidation and the release of hydrogen gas, mitigating safety risks. Additionally, kerosene oil does not undergo chemical reactions with sodium, providing a stable environment for storage. By keeping sodium submerged, the risk of accidents and hazards associated with its reactivity is minimized, ensuring safe handling and storage practices.