Solid State Tes...

Ice crystallises in a hexagonal lattice. At the, low temperature, the lattice constants were $$a = 4.53 A^{\circ}$$ and $$b = 7.41A^{\circ}$$. 

Argon crystallises in fcc arrangement and the density of solid and liquid $$Ar$$ is 1.59 $$g /$$ $$cm^3$$ and 1.42 $$g /$$ $$cm^3$$ , respectively . The percentage of empty space in liquid $$Ar$$ is:

The packing efficiency of the two-dimensional square unit cell shown below is:

Which one of the following is purely a crystalline compound?

How many defects exists in the arrangement of constituent particles of $$7.45\ g$$ $$KCl$$?
$$[K=39,Cl=35.5gm/mole]$$

CsBr ha cubic structure with edge length $$4.4\overset{o}{A}$$. The shortest interionic distance between $$Cs^{+}$$ and $$Br^-$$ is:

Percentage of free space in a body centred cubic unit cell is

The packing efficiency of the face centered cubic (fcc), body centered cubic (bcc) and simple primitive cubic (pc) lattices follows the order:

$$AB$$ has $$ZnS$$ type structure. What will be interionic distance between $${A}^{+}$$ and $${B}^{-}$$if lattice constant of $$AB$$ is $$200pm$$?

A compound formed by elements X and Y crystallizes in the cubic structure, where X atoms are at the corners of a cube and Y atoms are at the centre of the body. The formula of the compound is?