HARD

Earn 100

Draw the structure of $NaCl$ and represent the coordination numbers of ${Na}^{+}$ and ${Cl}^{-}$ ions in the diagram.

Important Questions on Solid state

EASY

Chemistry>Physical Chemistry>Solid state>Unit cells, two and three dimensional lattices

Iron crystallizes in several modifications. At about

911^{o} C

, the bcc

' α'

form undergoes a transition to fcc

' γ'

form. If the distance between two nearest neighbours is the same in the two forms at the transition temperature, what is the ratio of the density of iron in fcc form

(ρ_{2})

to the iron in bcc form

(ρ_{1})

at the transition temperature?

MEDIUM

Chemistry>Physical Chemistry>Solid state>Unit cells, two and three dimensional lattices

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?

EASY

Chemistry>Physical Chemistry>Solid state>Unit cells, two and three dimensional lattices

The packing efficiency of the face centered cubic (FCC), body centered cubic (BCC) and simple/primitive cubic (PC) lattices follows the order

MEDIUM

Chemistry>Physical Chemistry>Solid state>Unit cells, two and three dimensional lattices

In a face centered cubic lattice atoms A are at the corner points and atoms B at the face centered points. If atom B is missing from one of the face centered points, the formula of the ionic compound is :

HARD

Chemistry>Physical Chemistry>Solid state>Unit cells, two and three dimensional lattices

Lithium has a bcc structure. Its density is

530 k g m^{- 3}

and its atomic mass is

6.94 g m o l^{- 1}

. Calculated the edge length of a unit cell of Lithium metal.

(N_{A} = 6.02 \times 10^{23} m o l^{- 1})

EASY

Chemistry>Physical Chemistry>Solid state>Unit cells, two and three dimensional lattices

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>Unit cells, two and three dimensional lattices

Copper

(A t o m i c m a s s = 63.5)

crystallizes in a FCC lattice and has density

8 .93 g . {cm}^{- 3} .

The radius of copper atom is closest to

EASY

Chemistry>Physical Chemistry>Solid state>Unit cells, two and three dimensional lattices

a

the length of the side of a cube, the distance between the body centered atom one corner atom in the cube will be

MEDIUM

Chemistry>Physical Chemistry>Solid state>Unit cells, two and three dimensional lattices

100^{o} C,

copper

(C u)

has

F C C

unit cell structure with cell edge length of

x Å

. What is the approximate density of

C u

(in

g c m^{- 3}

) at this temperature?

[A t o m i c M a s s o f C u = 63.55 u]

EASY

Chemistry>Physical Chemistry>Solid state>Unit cells, two and three dimensional lattices

The vacant space in bcc lattice unit cell is:

HARD

Chemistry>Physical Chemistry>Solid state>Unit cells, two and three dimensional lattices

Consider the bcc unit cells of the solids $1$ and $2$ with the position of atoms as shown below. The radius of atom $B$ is twice that of atom $A .$ The unit cell edge length is $50 %$ more in solid $2$ than in $1$ . What is the approximate packing efficiency in solid $2$ ?

Question Image

HARD

Chemistry>Physical Chemistry>Solid state>Unit cells, two and three dimensional lattices

Iron exhibits BCC structure at room temperature. Above

900^{°} C

, it transforms to FCC structure. The ratio of the density of iron at room temperature to that at

900^{°} C

is (assuming molar mass and atomic radii of iron remains constant with temperature)

EASY

Chemistry>Physical Chemistry>Solid state>Unit cells, two and three dimensional lattices

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:

EASY

Chemistry>Physical Chemistry>Solid state>Unit cells, two and three dimensional lattices

A metal crystallizes in a face centred cubic structure. If the edge length of its unit cell is

' a'

, the closest approach between two atoms in the metallic crystal will be

MEDIUM

Chemistry>Physical Chemistry>Solid state>Unit cells, two and three dimensional lattices

The ratio of number of atoms present in a simple cubic, body centered cubic and face centered cubic structure are, respectively :

MEDIUM

Chemistry>Physical Chemistry>Solid state>Unit cells, two and three dimensional lattices

The percentage of unoccupied volume in simple cubic cell is

MEDIUM

Chemistry>Physical Chemistry>Solid state>Unit cells, two and three dimensional lattices

How many total constituent particles are present in simple cubic unit cell?

MEDIUM

Chemistry>Physical Chemistry>Solid state>Unit cells, two and three dimensional lattices

A mineral consists of a cubic close-packed structure formed by

O^{2 -}

ions where half the octahedral voids are occupied by

A l^{3 +}

and one-eighth of the tetrahedral voids are occupied by

M n^{2 +}

. The chemical formula of the mineral is

MEDIUM

Chemistry>Physical Chemistry>Solid state>Unit cells, two and three dimensional lattices

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:

MEDIUM

Chemistry>Physical Chemistry>Solid state>Unit cells, two and three dimensional lattices

If 'a' stands for the edge length of the cubic system: simple cubic, body-centred cubic and face-centred cubic, the ratio of radii of the spheres in these systems will be respectively

Draw the structure of NaCl and represent the coordination numbers of Na+ and Cl- ions in the diagram.

Important Questions on Solid state

Learn and Prepare for any exam you want !

Draw the structure of $NaCl$ and represent the coordination numbers of ${Na}^{+}$ and ${Cl}^{-}$ ions in the diagram.