Solid State

How are edge length '\(a\)' of the unit cell and radius '\(r\)' of the sphere related to each other in ccp structure? (Choose correct option for your answer)

How many number of tetrahedral voids are formed in \(5 \mathrm{~mol}\) of a compound having cubic close packed structure? (Choose the correct option)

What fraction of one edge centred octahedral void lies
in one unit cell of fcc?

A compound is formed by two elements A and B. The elements B forms cubic close packed structure and atoms of A occupy \(1 / 3\) of tetrahedral voids. If the formula of the compound is \(\mathrm{A}_{x} \mathrm{B}_{y}\), then the value of $$x...

Match List-I with List-II :

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Copper crystallises in fcc unit cell with cell edge length of 3.608 \(\times\) 10\(-\)8 cm. The density of copper is 8.92 g cm\(-\)3. Calculate the atomic mass of copper.

Choose the correct statement:

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : In a particular point defect, an ionic solid is electrically neutral, even if few of its cations are missing from its...

Right option for the number of tetrahedral and octahedral voids in hexagonal primitive unit cell are :

The correct option for the number of body centred unit cells in all 14 types of Bravais lattice unit cells is :

An element has a body centered cubic (bcc) structure with a cell edge of 288 pm. The atomic radius is :

A compound is formed by cation C and anion A. The anions form hexagonal close packed (hcp) lattice and
the cations occupy 75% of octahedral voids. The formula of the compound is :

Iron exhibits bcc structure at room temperature.
Above 900°C, it transforms to fcc structure. The
ratio of density of iron at room temperature to
that at 900°C (assuming molar mass and atomic
radii of iron remains constant with temperature)...

Which is the incorrect statement?

In calcium fluoride, having the fluorite structure, the coordination numbers for calcium ion (Ca2+) and fluoride ion (F\(-\)) are

Lithium has a bcc structure. Its density is 530 kg m\(-\)3 and its atomic mass is 6.94 g mol\(-\). Calculate the edge length of a unit cell of lithium metal. (NA = 6.02 \(\times\) 1023 mol\(-\)1)

The ionic radii of A+ and B\(-\) ions are 0.98 \(\times\) 10\(-\)10 m and 1.81 \(\times\) 10\(-\)10 m. The coordination number of each ion in AB is

A given metal crystallises out with a cubic structure having edge length of 361 pm. If there are four metal atoms in one unit cell, what is the radius of one atom?

The correct statement regarding defects in crystalline solids is

The vacant space in bcc lattice unit cell is

If \(a\) is the length of the side of a cube, the distance between the body centered atom and one corner atom in the cube will be

A metal has a fcc lattice. The edge length of the unit cell is 404 pm. The density of the metal is 2.72 g cm\(-\)3. The molar mass of the metal is
(NA Avogadro's constant = 6.02 \(\times\) 1023 mol\(-\)1)

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

A metal crystallises with a face-centred cubic lattice. The edge of the unit cell is 408 pm. The diameter of the metal atom is

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

Structure of a mixed oxide is cubic close packed (ccp). The cubic unit cell of mixed oxide is composed of oxide ions. One fourth of the tetrahedral voids are occupied by divalent metal A and the octahedral voids are cooupied by a monovalent...

A solid compound XY has NaCl structure. If the radius of the cation is 100 pm, the radius of the anion (Y\(-\)) will be

AB crystallizes in a body centered cubic lattice with edge length '\(a\)' equal to 387 pm. The distance between two oppositely charged ions in the lattice is

Lithium metal crystallises in a body-centred cubic crystal. If the length of the side of the unit cell of lithium is 351 pm, the atomic radius of lithium will be

Copper crystallises in a face-centred cubic lattice with a unit cell length of 361 pm. What is the radius of copper atom in pm?

Which of the following statements is not correct?

If \(a\) stands for the edge length of the cubic systems: simple cubic, body centred cubic and face centred cubic, then the ratio of radii of the spheres in these systems will be respectively

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

With which one of the following elements silicon should be doped so as to give p-type of semiconductor?

The fraction of total volume occupied by the atoms present in a simple cube is

If NaCl is doped with 10\(-\)4 mol% of SrCl2, the concentration of cation vacancies will be (NA = 6.02 \(\times\) 1023 mol\(-\)1)

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

CsBr crystallises in a body centered cubic lattice. The unit cell length is 436.6 pm. Given that the atomic mass of Cs = 133 and that of Br = 80 amu and Avogadro number being 6.02 \(\times\) 1023 mol\(-\)1, the density of CsBr is

In a face-centered cubic lattice, a unit cell is shared equally by how many unit cells?

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

The pyknometric density of sodium chloride crystal is 2.165 \(\times\) 103 kg m\(-\)3 while its X-ray density is 2.178 \(\times\) 103 kg m\(-\)3. The fraction of unoccupied sites in sodium chloride crystal is

When Zn converts from melted state to its solid state, it has hcp structure, then find the number of nearest atoms.

Cation and anion combines in a crystal to form following type of compound

In cube of any crystal A-atom placed at every corners and B-atom placed at every centre of face. The formula of compound is