Answer:
[tex]\boxed{\textsf{ The correct option is Option B \textbf{Chemical Change}.}}[/tex]
Step-by-step explanation:
Alkali metals such as Pottasium must be transported in special sealed containers because they have the ability to born or exclude upon contact with water due to their high reactivity. This is an example of Chemical Change .
Alkali metals like Pottasium (K) , Sodium (Na) , etc react vigorously with water . So they should be prevented in coming in contact to water . They are generally stored in kerosene . Here's an example of reaction of Alkali Metals with water .
★ Reaction of Sodium and Water :-
[tex]\boxed{\sf\underset{Sodium}{Na}+\underset{Water}{H_2O}\longrightarrow \underset{Sodium\ Hydroxide}{NaOH}+\underset{Hydrogen}{H_2} }[/tex]
