The metallic lustre exhibited by sodium is explained by

Amongst baking soda,caustic soda,and washing soda,the carbonate anion is present in ... .

Which of the following salts will produce a green flame on a $Pt$ wire?

The function of "Sodium pump" is a biological process operating in each and every cell of all animals. Which of the following biologically important ions is also a constituent of this pump?

Which of the following statement$(s)$ is (are) correct?
$(i)$ $LiF$ is less soluble in water
$(ii)$ $NaCl$ is less ionic than $CsCl$
$(iii)$ Formation of alkali metal halide is an endothermic reaction

Write a note on the physical properties of alkali metal elements (group $1$).