Concept:Highly reactive substances are stored in a medium that prevents contact with air and moisture.Explanation:Sodium is a very reactive metal. It reacts violently with oxygen in air and even with cold water, producing heat and fire. To stop this, sodium is kept under kerosene. Kerosene creates a barrier that blocks air and moisture. Phosphorus is a reactive non-metal. It catches fire instantly when exposed to air. Therefore, phosphorus is stored in water. Water prevents its contact with oxygen. These storage methods ensure safety.
Answer:Sodium is stored in kerosene whereas phosphorous is stored in water. Option C.
