Solid State Tes...

What is the co-ordination number of Cl^‒ in NaCl crystal ?

In a solid AB having the NaCl structure, ‘A’ atoms occupy the corners of the cubic unit cell. If all the face-centred atoms along one of the axes are removed, then the resultant stoichiometry of the solid is

A substance A_xB_y crystallises in a face centred cubic (FCC) lattice in which atoms ‘A’ occupy each corner of the cube and atoms ‘B’ occupy the centres of each face of the cube. Identify the correct composition of the substance A_xB_y

A binary solid (A⁺B^-) has a zinc blende structure with B^- ions constituting the lattice and A⁺ ions occupying 25% tetrahedral holes. The formula of solid is

A solid AB has NaCl type structure. If the radius of the cation A is 100 pm, then the radius of the anion B will be

The ionic radii of Rb⁺ and I^-are 1.46 and 2.16 Å respectively. The most probable type of structure exhibited by it is

The second order Bragg diffraction of X- rays with λ =1.00Å from a set of parallel planes in a metal occurs at an angle of 60^o. The distance between the scattering planes in the crystal is

The wavelength of X-rays which gives a diffraction angle, 2Ө, equal to 16.80º for a first order diffraction for a crystal with interplanar distance 0.200 nm, is ( given sin 8.4º = 0.146)

X- rays of wavelength equal to 0.134 nm give a first order diffraction from the surface of a crystal when the value of θ is 10.5º. The distance between the planes in the crystal parallel to the surface is (sin 10.5º = 0.1822)

If NaCl is doped with 10^-3 mol % SrCl₂ then the concentration of cation vacancies will be :