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The crystal system of a compound with unit cell dimensions a = 0.387, b = 0.387 and c = 0.504 nm and $α = β = 9 0^{o}$ and $γ = 12 0^{o}$ is

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Important Questions on Solid State

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Chemistry>Physical Chemistry>Solid State>Unit Cells, Two and Three Dimensional Lattices

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>Unit Cells, Two and Three Dimensional Lattices

The parameters of the unit cell of a substance are

a = 2.5, b = 3.0, c = 4.0, α = 90 °, β = 120 ° γ = 90 ° .

The crystal system of the substance is :

EASY

Chemistry>Physical Chemistry>Solid State>Unit Cells, Two and Three Dimensional Lattices

a, b, c

are the lengths of three edges of unit cell,

α

is the angle between side

b

and

c, β

is the angle between side

a

and

c

and

γ

is the angle between side

a

and

b,

what is the Bravais Lattice dimensions of a tetragonal crystal?

EASY

Chemistry>Physical Chemistry>Solid State>Unit Cells, Two and Three Dimensional Lattices

Which among the following metals crystallises as a simple cube?

HARD

Chemistry>Physical Chemistry>Solid State>Unit Cells, Two and Three Dimensional Lattices

NaCl

is a

FCC

lattice where

{Na}^{+}

ions are at corner and face centre positions. Chloride ions are at edge centres and body centre positions. How many

NaCl

formula units will be in an unit cell

EASY

Chemistry>Physical Chemistry>Solid State>Unit Cells, Two and Three Dimensional Lattices

A compound

M_{p} X_{q}

has cubic close packing (

ccp

) arrangement of

X

. Its unit cell structure is shown below. The empirical formula of the compound is

Question Image

EASY

Chemistry>Physical Chemistry>Solid State>Unit Cells, Two and Three Dimensional Lattices

Which among the following is the most symmetrical crystal system?

EASY

Chemistry>Physical Chemistry>Solid State>Unit Cells, Two and Three Dimensional Lattices

How many crystal system are there when

a \neq b \neq c

and

a = b = c

EASY

Chemistry>Physical Chemistry>Solid State>Unit Cells, Two and Three Dimensional Lattices

A compound formed by elements

X

and

Y

crystallises in the cubic structure, where

X

atoms are at the corners of a cube and

Y

atoms are at the centre of the body. The formula of the compounds is

EASY

Chemistry>Physical Chemistry>Solid State>Unit Cells, Two and Three Dimensional Lattices

F . C . C .

the cell is shared equally by how many unit cells?

EASY

Chemistry>Physical Chemistry>Solid State>Unit Cells, Two and Three Dimensional Lattices

In the face centered unit cell, the lattice points are present at

HARD

Chemistry>Physical Chemistry>Solid State>Unit Cells, Two and Three Dimensional Lattices

If the angle of incidence of X-ray of wavelength

3 Å

which produces a second order diffracted beam from the

(100)

planes in a simple cubic lattice with interlayer spacing

a = 6 Å i s 30^{o},

the angle of incidence that produces a first - order diffracted beam from the

(200)

planes is

MEDIUM

Chemistry>Physical Chemistry>Solid State>Unit Cells, Two and Three Dimensional Lattices

The

FCC -

crystal contains how many atoms in each unit cell?

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Chemistry>Physical Chemistry>Solid State>Unit Cells, Two and Three Dimensional Lattices

An element occurring in the

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>Unit Cells, Two and Three Dimensional Lattices

A match box exhibits

MEDIUM

Chemistry>Physical Chemistry>Solid State>Unit Cells, Two and Three Dimensional Lattices

In a solid

AB, A

atoms are in

ccp

arrangement and

B

atoms occupy all the octahedral sites. If two atoms from the opposite faces are removed, then the resultant stoichiometry of the compound is

A_{x} B_{y}

. The value of

x

is [nearest integer]

MEDIUM

Chemistry>Physical Chemistry>Solid State>Unit Cells, Two and Three Dimensional Lattices

Polonium (atomic mass

= 209

) crystallises in a simple cubic structure with a density of

9.32 g {cm}^{- 3}

. Its lattice parameter (in

pm

) is closest to

EASY

Chemistry>Physical Chemistry>Solid State>Unit Cells, Two and Three Dimensional Lattices

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

EASY

Chemistry>Physical Chemistry>Solid State>Unit Cells, Two and Three Dimensional Lattices

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

EASY

Chemistry>Physical Chemistry>Solid State>Unit Cells, Two and Three Dimensional Lattices

Which primitive unit cell has unequal edge lengths

(a \neq b \neq c)

and all axial angles different from

90^{o}

The crystal system of a compound with unit cell dimensions a = 0.387, b = 0.387 and c = 0.504 nm and α=β=90o and γ=120o is

Important Questions on Solid State

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The crystal system of a compound with unit cell dimensions a = 0.387, b = 0.387 and c = 0.504 nm and $α = β = 9 0^{o}$ and $γ = 12 0^{o}$ is