The alkaline earth metal with the lowest density is

What are the products formed in sequence when excess of $CO_{2}$ is passed in slaked lime?

Which of the following statement$(s)$ is/are correct?
$(i)$ $LiNO_3$ and $Ba(NO_3)_2$ both will give $NO_2$ on heating.
$(ii)$ $BaSO_4$ is less soluble in water than $CaSO_4$.
$(iii)$ Alkaline earth metals do not dissolve in liquid ammonia.

Which of the following magnetic properties is exhibited by the compounds of alkaline earth metals?

All the elements of group $2$ react with water to form metal hydroxide and hydrogen,except the element

Calcium is obtained by which of the following methods?