Bravais lattices are of: 

Important Questions on Solid State

EASY

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

Which primitive unit cell has unequal edge lengths $\left(a\ne b\ne c\right)$ and all axial angles different from ${90}^o$

EASY

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

Which among the following is the most symmetrical crystal system?

MEDIUM

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

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

EASY

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

Which among the following metals crystallises as a simple cube?

EASY

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

A compound formed by elements $\mathrm{X}$ and $\mathrm{Y}$ crystallises in the cubic structure, where $\mathrm{X}$ atoms are at the corners of a cube and $\mathrm{Y}$ atoms are at the centre of the body. The formula of the compounds is

EASY

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

A compound ${\mathrm{M}}_{\mathrm{p}}{\mathrm{X}}_{\mathrm{q}}$ has cubic close packing ($\mathrm{ccp}$) arrangement of $\mathrm{X}$. Its unit cell structure is shown below. The empirical formula of the compound is

EASY

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

If $\mathrm{a}, \mathrm{b}, \mathrm{c}$ are the lengths of three edges of unit cell, $\mathrm{\alpha }$ is the angle between side $\mathrm{b}$ and $\mathrm{c}, \mathrm{\beta }$ is the angle between side $\mathrm{a}$ and $\mathrm{c}$ and $\mathrm{\gamma }$ is the angle between side $\mathrm{a}$ and $\mathrm{b},$ what is the Bravais Lattice dimensions of a tetragonal crystal?

MEDIUM

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

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

EASY

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

In $\mathrm{F}.\mathrm{C}.\mathrm{C}.$ the cell is shared equally by how many unit cells?

EASY

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

In which crystal system, the length of each edge (edge length) is same?

MEDIUM

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

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

EASY

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

What are two types of crystal structures shown by ice at different pressures?

HARD

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

The CORRECT statement(s) for cubic close packed (ccp) three dimensional structure is (are)

MEDIUM

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

An element occurring in the $\mathrm{BCC}$ structure has $12.05\times {10}^{23}$ unit cells. The total number of atoms of the element in these cells will be

MEDIUM

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

A mineral consists of a cubic close-packed structure formed by ${\mathrm{O}}^{2-}$ ions where half the octahedral voids are occupied by $\mathrm{A}{\mathrm{l}}^{3+}$ and one-eighth of the tetrahedral voids are occupied by $\mathrm{M}{\mathrm{n}}^{2+}$ . The chemical formula of the mineral is

EASY

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

In a cubic close packed structure, fractional contributions of an atom at the corner and at the face in the unit cell are, respectively -

EASY

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

A metal crystallizes in a face centred cubic structure. If the edge length of its unit cell is $\text{'}\mathrm{a}\text{'}$, the closest approach between two atoms in the metallic crystal will be

EASY

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

The parameters of the unit cell of a substance are $\mathrm{a}=2.5, \mathrm{b}=3.0, \mathrm{c}=4.0, \alpha =90°, \beta =120°\gamma =90°.$ The crystal system of the substance is :

HARD

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

$\mathrm{NaCl}$ is a $\mathrm{FCC}$ lattice where ${\mathrm{Na}}^{+}$ ions are at corner and face centre positions. Chloride ions are at edge centres and body centre positions. How many $\mathrm{NaCl}$ formula units will be in an unit cell

HARD

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

If the angle of incidence of X-ray of wavelength $3 Å$ which produces a second order diffracted beam from the $\left(100\right)$ planes in a simple cubic lattice with interlayer spacing $a=6 Å \mathrm{i}\mathrm{s} {30}^o,$ the angle of incidence that produces a first - order diffracted beam from the $\left(200\right)$ planes is