Solid State

A compound of formula A2B3 has the hcp lattice. Which atom forms the hcp lattice and what fraction of tetrahedral voids is occupied by the other atoms :

Which of the following arrangements shows the schematic alignment of magnetic moments of antiferromagnetic substance ?

All of the following share the same crystal structure except :

Which type of ‘defect’ has the presence of cations in the interstitial sites?

A metal crystallises in a face centred cubic structure. If the edge length of its unit cell is ‘a’, the closest
approach between two atoms in metallic crystal will be :

Sodium metal crystallizes in a body centred cubic lattice with a unit cell edge of 4.29 Å . The radius of
sodium atom is approximately :

CsCl crystallises in body centred cubic lattice. If ‘a’ is its edge length then which of the following
expressions is correct?

Which of the following exists as covalent crystals in the solid state?

Lithium forms body centred cubic structure. The length of the side of its unit cell is 351 pm. Atomic radius
of the lithium will be :

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

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

Percentages of free space in cubic close packed structure and in body centred packed structure are
respectively :

Copper crystallizes in fcc with a unit cell length of 361 pm. What is the radius of copper atom?

In a compound atoms of element Y from ccp lattice and those of element X occupy 2/3rd of tetrahedral
voids. The formula of the compound will be :

Total volume of atoms present in a face-centre cubic unit cell of a metal is (r is atomic radius) :

An ionic compound has a unit cell consisting of A ions at the corners of a cube and B
ions on the centres of the faces of the cube. The empirical formula for this compound
would be :

What type of crystal defect is indicated in the diagram below?

How many unit cells are present in a cubeshaped ideal crystal of NaCl of mass 1.00 g?
[Atomic masses: Na = 23, Cl = 35.5]

Na and Mg crystallize in BCC and FCC type crystals respectively, then the number of atoms of
Na and Mg present in the unit cell of their respective crystal is :