Which of the following elements release $H_2$ gas on reaction with $NaOH$?

Select the incorrect statement.

The solubility of the alkali metal carbonates:

$A$ chloride salt dissolves appreciably in cold water. When placed on a platinum wire in a Bunsen flame,no distinctive color is noted. Which cation could be present?

Which pair of atomic numbers represents $s$-block elements?

$A$ fire of lithium,sodium,and potassium can be extinguished by