Solid state practice · Mixed difficulty

In a monoclinic unit cell the relation of sides and
angles are respectively:

Which one is correct about ferrites?

The co-ordination number of $\mathrm{C}{\mathrm{a}^{2 + }}$ ion in fluorite crystal is :

$\mathrm{Ti}{\mathrm{O}_2}$ is well known example of :

The number of octahedral void(s) per atom present in a cubic close-packed structure is :

A compound of ‘A’ and ‘B’ crystallises in a cubic lattice in which ‘A’ atoms occupy the lattice points at the corners of the cube. The ‘B’ atoms occupy the centre of each face of the cube. The probable empirical formula of the compound is

The unit cell with crystallographic dimensions $a = b \ne c;\alpha = \beta = \gamma = 90^\circ$ is :

Which arrangement of electrons leads to anti-ferromagnetism?

The number of equidistance oppositely charged ions in a sodium chloride crystal is

A cubic crystal possesses in all ……elements of symmetry.

$ZnS$ is:

Among the following species, the one which become paramagnetic on heating at $850 {~K}$ is

Which of the following arrangement correctly shows the magnetic moment of anti-ferromagnetic substance?

The tetrahedral voids formed by ccp arrangement of ${Cl^-}$ ions in rock salt structure are:

The pyknometric density of sodium chloride crystal is $2.165 \times {10^3}\;\mathrm{kg}\;{\mathrm{m}^{ - 3}}$ while is X-ray density is $2.178 \times {10^3}\;\mathrm{kg}\;{\mathrm{m}^{ - 3}}$. The fraction of the unoccupied sites in sodium chloride crystal is :

Assertion : Stability of a crystal is reflected in the magnitude of its melting point.

Reason : The stability of a crystal depends upon the strength of the interparticle attractive force.

Assertion (A) Both Frenkel and Schottky defects are stoichiometric defects.

Reason (R) Both defects change the density of the crystalline solid.

The number of carbon atoms per unit cell of diamond unit cell is

The number of atoms contained in a fcc unit cell of a monoatomic substance is

Order of packing efficiency is

The appearance of colour in solid state of alkali metal halides is due to

Structure similar to zinc blende is found in

How many number of atoms are there in a cube based unit cell having one atom on each corner and two atoms on each body diagonal of cube

In zinc blende structure, the coordination number of $\mathrm{Z}{\mathrm{n}^{2 + }}$ ion is

Which is the incorrect statement?

The number of octahedral void(s) per atom present in a cubic close-packed structure is :

The number of unit cells in the Ca atom lies on the surface of a cubic crystal that is $1.0 \mathrm{~cm}$ in length is

In diamond, the coordination number of carbon is

A metallic element exists as simple cubic lattice. Each edge of the unit cell is 3Å. The density of the metal is $9 \mathrm{~g} \mathrm{~cm}^{-3}$. How many number of unit cells will be present in $100 \mathrm{~g}$ of the metal :-

The ratio of cationic radius to anionic radius in an ionic crystal is greater than 0.732. Its coordination number is