The volume occupied by all the particles in a $B.C.C.$ unit cell is

An alloy made up of $A$ and $B$ metals crystallises in a cubic lattice,where $B$ atoms occupy the corners and $A$ atoms occupy the face centers. The formula of the alloy formed is

The coordination number of an atom in a body-centered cubic $(BCC)$ structure is:
[Assume that the lattice is made up of atoms.]

In the crystal of $CsCl$,the nearest neighbours of each $Cs^+$ ion are

In a mixed oxide of two metals $X$ and $Y$,divalent $X^{2+}$ ions occupy $50\%$ of the tetrahedral voids,while trivalent $Y^{3+}$ ions occupy $50\%$ of the octahedral voids. The formula of the oxide is:

In $FCC$ lattice,alternate tetrahedral voids are occupied in which of the following?