Question

(a) Name one metal which is stored in kerosene oil?
(b) Name one nonmetal which is stored under water?

Answer 1

Hint: Metals tend to be hard, metallic-looking solids, with high electrical and thermal conductivity values and high melting and boiling points. Nonmetals tend to be softer, often colourful elements. They may be solids, liquids, or gases. They have lower melting and boiling points than most metals and aren't usually good conductors.

Complete Step By Step Answer:
Some highly active metals are stored in kerosene to prevent them from reacting explosively when exposed to light or moisture.
Because sodium is a very reactive metal, it is kept in kerosene. It easily reacts with oxygen and catches fire if left out in the open. It will not react with kerosene because it is a combination of hydrocarbons. Because the interactions between sodium and water are highly exothermic, sodium should not be held in water.
In its purest form, phosphorus is white. White phosphorus is the most hazardous kind of phosphorus that we are aware of. When white phosphorus is found in nature, it poses a major health danger. White phosphorus is extremely poisonous and can be lethal in many circumstances.
Because white phosphorus is insoluble in water, it is kept submerged to avoid oxidation. The production of Lucifer matches included the use of yellow phosphorus. White phosphorus is brilliant in the dark, toxic, and flammable, spontaneously igniting in the air unless stored submerged.
Hence, Sodium is the metal that is stored in kerosene. Phosphorus is the non metal that is stored under water.

Note:
Sodium is a chemical element with the atomic number $ 11 $ and the symbol $ Na $ . It's a delicate, silvery-white metal with a high reactivity. Sodium belongs to the periodic table's group $ 1 $ as an alkali metal. Phosphorus is a chemical element with atomic number $ 15 $ and the symbol $ P $ . Phosphorus exists in two major forms: white phosphorus and red phosphorus, however it is never found as a free element on Earth due to its extreme reactivity.