Test: Solid State - 2

A solid is formed and it has three types of atoms X, Y, Z. X forms a FCC lattice with Y atoms occupying all the tetrahedral voids and Z atoms occupying half the octahedral voids. The formula of the solid is:

Which of the following will show Schottky defect?

In FCC unit cell, what fraction of edge is not covered by atoms:

If edge length of the unit cell is 356 pm, then radius of carbon atom in diamond:

In a cubic unit cell, the angle between normal to the planes (111) and (121) is:

How many unit cells are present in a cube-shaped ideal crystal of NaCl of mass 1.0 g? 

Co-ordination no. of ‘c’ in Be₂C₃ whose structure is co-related with CaF₂ is:

The value of d₁₁₁ in a cubic crystal is 325.6 pm. The value of d₃₃₃ is (d = interplaner spacing):

X-rays of wKa (wavelength 154 pm) are diffracted by a set of atomic planes in a crystals in the following manner. The separation of the la yers in the crystals in 404 Pm. Find the angle a along which the first order reflection will occur:

In Rocksalt structure:

In a fcc lattice, atom A occupies the corner position and atom B occupies the face centre position. If one atom of B is missing from one of the face centred points, the formula of the compound is:

The angle between the two planes represented by the Miller indices (110) and (111) in a simple cubic:

The coordinate number for an atom in a primitive cubic unit cell is

The three dimensional graph of lattice points which sets the pattern for the whole lattice is called

When Frenkel defects are created in an otherwise perfect ionic crystal, the density of the ionic crystal:

The compound formed by elements X and Y crystallizes in cubic structure in which X atoms are at the corners of the cube and Y atoms are at the face centre . The formula of the compound is

The angle at which the first order Bragg reflection is observed from (110) plane in a simple cubic unit cell of side 3.238 Å when chromium Ka radiation of wavelength 2.29 Å is used, is:

Number of rotational symmetry axes for triclinic crystal system is:

The lattice parameter of an element stabilized in a fcc structure is 4.04 Å. The atomic radius of the element is:

A metal crystallizes in fcc structure with a unit cell side of 500 pm. If the density of the crystal is 1.33 g/cc, the molar mass of the metal is closed to:

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

An element exists in two crystallographic modifications with FCC and BCC structures. The ratio of the densities of the FCC and BCC modifications in terms of the volumes of their unit cells (V_FCC and V_BCC) is:

Metallic gold crystallizes in fcc structure with unit cell dimension of 4.00 Å The atomic radius.

Both NaCl and KCl crystallize with Fcc structure. However, the X-ray powder diffraction pattern corresponds to the fcc structure whereas, that, of KCl corresponds to sample cubic structure. This is because:

A compounds A_x B_y has a cubic structure with A atoms occupying all the face centre positions. The B atoms occupy four tetrahedral voids. The values of x and y respectively,are:

The interplanar spacing of (110) planes in a cubic unit cell with lattice parameter a = 4.242 Å is:

The edge length of a face centred cubic cell of an ionic substance is 508 pm. If the radius of the cation is 110 pm, the radius of the anion is