List of top Chemistry Questions on General Chemistry asked in Telangana State Engineering Agriculture & Medical CET

NaCl is crystallized in the presence of small quantity of SrCl$_2$. The formula of crystallized solid is Na$_{0.9998}$Sr$_{0.0001}$Cl. The number of cationic vacancies per mole of this solid is (N=6$\times10^{23}$ mol$^{-1}$)
Identify the crystal system in which body-centered lattice is not present.
Identify the correct set