Question

why sodium is stored in kerosene​

Answer 1

Sodium is stored in kerosene​  for the following reasons;-

Sodium reacts with water vigorously. Sodium is stored in kerosene because it does not contain any water. So there is a lesser chance that Sodium will react vigorously with water when kept under the environment of kerosene oil.

    2. Sodium reacts with oxygen/air vigorously. Sodium is stored in kerosene        because it does allow air/oxygen to enter its environment. So there is a lesser chance that Sodium will react vigorously with air/oxygen when kept under the environment of kerosene oil.