Which group of elements is stored in oil due to their reactive nature with water and air?

Q.

1. Which group of elements is stored in oil due to their reactive nature with water and air?

2. Waht is deterioration of a metal by chemical or electrochemical reaction with its environment called?

Q. A highly reactive element X is stored under water. It readily reacts with oxygen of air to give a compound Y which dissolves in water. The aqueous solution of Y changes blue litmus solution to red. The element X is____

Q. Which of the following elements is preferred to be stored in kerosene oil?

Q. IA group elements tend to be reactive due to their electronic configuration ($n{s}^1$) in their valence shell. Depending on their size, they form different type of basic oxide.

57.5 kg of $Na$ is heated in air at $180{}^{o}C$. The formed pale yellow salt is allowed to stoichiometrically react with water. One of the product formed - $X$ gives no result with either red nor blue litmus paper.
Assuming 65% efficiency of the overall process, weight of $X$ is ___.