Question

Why should sodium kept immersed in kerosene oil?

Answer 1

Sodium is highly reactive in the presence of oxygen in air therefore to avoid contact it is being kept in kerosene oil

Answer 2

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Sodium and Potassium are highly reactive metals and react vigorously with the oxygen, carbon dioxide and moisture present in the air such that it may even cause a fire. To prevent this explosive reaction, Sodium is kept immersed in kerosene because Sodium doesn’t react with kerosene.