Alkaline earth metals are denser than alkali metals,because metallic bonding in alkaline earth metals is:

Given below are two statements:
Statement $I$: Both $CaCl_2 \cdot 6H_2O$ and $MgCl_2 \cdot 8H_2O$ undergo dehydration on heating.
Statement $II$: $BeO$ is amphoteric whereas the oxides of other elements in the same group are acidic.
In the light of the above statements,choose the correct answer from the options given below:

Pure anhydrous $MgCl_2$ can be prepared from the hydrated salt by

Which of the following substances is the least soluble in water?

The major ingredient $(51 \%)$ in Portland cement is

Given below are two statements:
Statement $I$: None of the alkaline earth metal hydroxides dissolve in alkali.
Statement $II$: Solubility of alkaline earth metal hydroxides in water increases down the group.
In the light of the above statements,choose the most appropriate answer from the options given below: