Solid State Tes...

Select the correct order for covalent radii :

Metallic copper crystallises in bcc lattice. The length of the cubic unit cell is $362$ pm. The density (in g cm$^{-3}$) of crystalline copper is:

The ratio of packing density in fcc, bcc and cubic structure is respectively_________.

The packing fraction for a body-centered cube is________.

KF has a NaCl structure. What is the distance (in pm) between $K^+$ and $F^-$ in KF if the density is $2.48$ g cm$$^{-3}$ $?

Which one of the following schemes of ordering closed packed sheets of equal sized spheres do not generate close packed lattice?

The empty space left in hcp in three dimensions is :

Chromium metal crystallizes as a body-centered cubic lattice. The length of the unit cell edge is found to be $287$ pm. What would be the density (in g cm$^{-3}$) of chromium?

Ice crystallizes in a hexagonal lattice. At low temperature, at which the structure was determined, the lattice constants were $a\, =\, 4.53\ \mathring A$ and $b = 7.60\ \mathring A$ (see figure). How many molecules of water are contained in a given unit cell?  [Density of ice is $0.92$ g cm$^{-3}$.]