Solid State Tes...

Percentage of empty space in body centered cubic unit cell is nearly:

If $$a$$ is the edge length, first three nearest neighbour distances for primitive cubic lattice are, respectively:

The density of a pure substance A whose atoms are in cubic closed packed arrangement is $$1$$ g/cc. If all the tetrahedral voids are occupied by B atoms, what is the density (in g cm$$^{-3}$$) of resulting solid?[Atomic mass of $$A=30$$ g/mol and atomic mass of $$B=50$$ g/mol]

Select the correct statement(s) :

Graphite has hcp arrangement of carbon atoms and the parallel planes are $$3.35$$ $$\mathring A$$ apart. The density (in g cm$$^{-3}$$) of graphite is :

The density for an FCC lattice is: 

Which of the following is not an amorphous substance?

If $$A$$ is the atomic mass number of an element, $$N$$ is the Avogadro number and $$a$$ is the lattice parameter, then the density of the element, if it has bcc crystal structure, is_________.

Correct order for lattice energy of the given crystals is :

Lattice energy of NaCl is $$-186$$ kcal/mol. If solution enthalpies of Na$$+$$ and Cl$$^-$$ are $$-97$$ kcal/mol and $$-85$$ kcal/mol respectively. The enthalpy NaCl solution in kcal will be: