Solid State

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

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 :

In a binary compound, atoms of element A form a hcp structure and those of element M occupy 2/3 of the tetrahedral voids of the hcp structure. The formula of the binary compound is :

A compound is formed by two elements $$\mathrm{X}$$ and $$\mathrm{Y}$$. The element $$\mathrm{Y}$$ forms cubic close packed arrangement and those of element $$\mathrm{X}$$ occupy one third of the tetrahedral voids. What is the formula of the compound?

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 :

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

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

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 :

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 :

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 :

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 :

All of the following share the same crystal structure except :

At 100^oC, copper (Cu) has FCC unit cell structure with cell edge length of x $$\mathop A\limits^o$$. What is the approximate density of Cu (in g cm^$$-$$3) at this temperature? [Atomic Mass of Cu = 63.55 u]

Which premitive unit cell has unequal edge lengths (a $$\ne$$ b $$\ne$$ c) and all axial angles different from 90^o?

A solid having density of 9$$\times$$10³ kg m^–3 forms face centred cubic crystals of edge length $$200\sqrt 2$$ pm. What is the molar mass of the solid? [Avogadro constant $$\cong$$ 6 $$\times$$ 10²³ mol^–1 , $$\pi$$ $$\cong$$ 3]

The radius of the largest sphere which fits properly at the centre of the edge of a body centred cubic unit cell is : (Edge length is represented by 'a')

Element 'B' forms ccp structure and 'A' occupies half of the octahedral voids, while oxygen atoms occupy all the tetrahedral voids, The structure of bimetallic oxide is :

10 mL of 1mM surfactant solution forms a monolayer covering 0.24 cm² on a polar substrate. If the polar head is approximated as cube, what is its edge length?

An element has a face-centred cubic (fcc) structure with a cell edge of $$a$$. The distance between the centres of two nearest tetrahedral voids in the lattice is :