EASY

Earn 100

Identify the wrong statements about zinc blende type structure.

100% studentsanswered this correctly

Important Questions on Solid State

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

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

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

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

EASY

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

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

What is the co-ordination number of

{Cl}^{-}

NaCl

crystal ?

MEDIUM

Chemistry>Physical Chemistry>Solid State>Packing in Voids of Ionic Solids

How many Bravais lattices are possible in a crystal?

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

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

The fraction of voids occupied in the inverse spinel compounds are

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

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

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

]

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?

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

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

MEDIUM

Chemistry>Physical Chemistry>Solid State>Packing in Voids of Ionic Solids

A binary solid

(A^{+} B^{-})

has a zinc blende structure with

B^{-}

ions constituting the lattice and

A^{+}

ions occupying 25% tetrahedral holes. The formula of solid is:

EASY

Chemistry>Physical Chemistry>Solid State>Packing in Voids of Ionic Solids

If radius of anion is 0.20 nm, the maximum radius of cations which can be filled in respective voids are correctly matched in:

MEDIUM

Chemistry>Physical Chemistry>Solid State>Packing in Voids of Ionic Solids

The number of unit cells in

58.5 g of NaCl

is approximately

Identify the wrong statements about zinc blende type structure.

Important Questions on Solid State

Learn and Prepare for any exam you want !