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The structure of $TlCl$ is similar to $CsCl$ . What would be the radius ratio of $TlCl$ ?

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Important Questions on Solid state

MEDIUM

Chemistry>Physical Chemistry>Solid state>Packing in voids of ionic solids

The arrangement of X^- ions around A⁺ ion in solid AX is given in the figure (not drawn to scale). If the radius of X^- is 250 pm, the radius of A⁺ is

Question Image

EASY

Chemistry>Physical Chemistry>Solid state>Packing in voids of ionic solids

ZnS

crystal,

{Zn}^{2 +}

ions occupy _____ void.

HARD

Chemistry>Physical Chemistry>Solid state>Packing in voids of ionic solids

Consider an ionic solid

MX

, with

NaCl

structure. Construct a new structure

(Z)

, whose unit cell is constructed from the unit cell of

MX

, following the sequential instructions given below. Neglect the charge balance.

(i)

Remove all the anions

(X)

, except the central one.

(ii)

Replace all the face centered cations

(M)

, by anions

(X)

(iii)

Remove all the corner cations

(M)

(iv)

Replace the central anion

(X)

, with cation

(M)

.

The value of

(\frac{n u m b e r o f a n i o n s}{n u m b e r o f c a t i o n s})

Z

is _____.

EASY

Chemistry>Physical Chemistry>Solid state>Packing in voids of ionic solids

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>Packing in voids of ionic solids

In a compound, atoms of element

Y

form

ccp

lattice and those of element

X

occupy

\frac{2}{3}

of tetrahedral voids. The formula of the compound will be

EASY

Chemistry>Physical Chemistry>Solid state>Packing in voids of ionic solids

The vacant space in bcc lattice unit cell is:

MEDIUM

Chemistry>Physical Chemistry>Solid state>Packing in voids of ionic solids

Ionic radii of cation

A^{+}

and anion

B^{-}

are

102

and

181 pm

respectively. These ions are allowed to crystallize into an ionic solid. This crystal has cubic close packing for

B^{-} . A^{+}

is present in all octahedral voids. The edge length of the unit cell of the crystal

AB

is___

pm

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Chemistry>Physical Chemistry>Solid state>Packing in voids of ionic solids

A unit cell of calcium fluoride has four calcium ions. The number of fluoride ions in the unit cell is

MEDIUM

Chemistry>Physical Chemistry>Solid state>Packing in voids of ionic solids

The radius of

K^{+}

133 pm

and that of

{Cl}^{-}

181 pm

. The volume of the unit cell of

KCl

expressed in

10^{- 22} {cm}^{3}

is:

EASY

Chemistry>Physical Chemistry>Solid state>Packing in voids of ionic solids

What is the co-ordination number of

{Cl}^{-}

NaCl

crystal ?

MEDIUM

Chemistry>Physical Chemistry>Solid state>Packing in voids of ionic solids

Edge length of a cube is

300 pm

. Its body diagonal would be

MEDIUM

Chemistry>Physical Chemistry>Solid state>Packing in voids of ionic solids

If the edge length of a body centred unit cell is

400 pm,

what will be the approximate radius of the atom present in it? (in pm)

MEDIUM

Chemistry>Physical Chemistry>Solid state>Packing in voids of ionic solids

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

MEDIUM

Chemistry>Physical Chemistry>Solid state>Packing in voids of ionic solids

The ionic radii of

A^{+}

and

B^{-}

ions are

0.98 \times 10^{- 10} m

and

1.81 \times 10^{- 10} m

. The coordination number of each ion in AB is

EASY

Chemistry>Physical Chemistry>Solid state>Packing in voids of ionic solids

In calcium fluoride, having the fluorite structure, the coordination numbers for calcium ion

(C a^{2 +})

and fluoride ion

(F^{-})

are

EASY

Chemistry>Physical Chemistry>Solid state>Packing in voids of ionic solids

What are the coordination numbers (C.N.) of

{Ca}^{2 +}

and

F^{-}

ion in calcium fluoride

({CaF}_{2})

crystal structure ?

EASY

Chemistry>Physical Chemistry>Solid state>Packing in voids of ionic solids

CsCl

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

HARD

Chemistry>Physical Chemistry>Solid state>Packing in voids of ionic solids

Number of unit cells present in a cubic shaped ideal crystal of

NaCl

of mass

1.00 g

is [Molecular mass

= 58.5

]

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Chemistry>Physical Chemistry>Solid state>Packing in voids of ionic solids

What is the ratio of octahedral holes to the number of anions in hexagonal closed packed structure?

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Chemistry>Physical Chemistry>Solid state>Packing in voids of ionic solids

What is the value of radius ratio of ionic crystal having coordination number six?

The structure of TlCl is similar to CsCl. What would be the radius ratio of TlCl?

Important Questions on Solid state

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The structure of $TlCl$ is similar to $CsCl$ . What would be the radius ratio of $TlCl$ ?