$Sodium$ metal is highly reactive and cannot be stored under:

Which of the following is an ore of potassium?

Identify the alkali metal having the smallest atomic size from the following.

For alkali metals, which one of the following trends is incorrect?

Select the correct statement.

Which of the following statements are correct for alkali metal compounds?
$(i)$ Superoxides are paramagnetic in nature.
(ii) The basic strengths of hydroxides increase down the group.
(iii) The conductivity of chlorides in their aqueous solutions decreases down the group.
(iv) The basic nature of carbonates in aqueous solutions is due to cationic hydrolysis.