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A compound $AB$ having formula weight $= 6.023 \times Y AMU$ , has rock salt type structure and the closest AB distance is $Y^{\frac{1}{3}}$ nm, where $Y$ is an arbitrary number. The density of lattice is

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Important Questions on Solid state

EASY

Chemistry>Physical Chemistry>Solid state>Ionic Solids and their Structures

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>Ionic Solids and their Structures

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

MEDIUM

Chemistry>Physical Chemistry>Solid state>Ionic Solids and their Structures

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)

HARD

Chemistry>Physical Chemistry>Solid state>Ionic Solids and their Structures

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

EASY

Chemistry>Physical Chemistry>Solid state>Ionic Solids and their Structures

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>Ionic Solids and their Structures

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>Ionic Solids and their Structures

What is the co-ordination number of

{Cl}^{-}

NaCl

crystal ?

MEDIUM

Chemistry>Physical Chemistry>Solid state>Ionic Solids and their Structures

The correct option for the number of body centred unit cells in all

14

types of Bravais lattice unit cells is:

MEDIUM

Chemistry>Physical Chemistry>Solid state>Ionic Solids and their Structures

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

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MEDIUM

Chemistry>Physical Chemistry>Solid state>Ionic Solids and their Structures

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:

MEDIUM

Chemistry>Physical Chemistry>Solid state>Ionic Solids and their Structures

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>Ionic Solids and their Structures

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 _____.

HARD

Chemistry>Physical Chemistry>Solid state>Ionic Solids and their Structures

The cubic unit cell structure of a compound containing cation $M$ and anion $X$ is shown below. When compared to the anion, the cation has smaller ionic radius. Choose the correct statement(s).

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HARD

Chemistry>Physical Chemistry>Solid state>Ionic Solids and their Structures

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

NaCl

of mass

1.00 g

is [Molecular mass

= 58.5

]

HARD

Chemistry>Physical Chemistry>Solid state>Ionic Solids and their Structures

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

MEDIUM

Chemistry>Physical Chemistry>Solid state>Ionic Solids and their Structures

A match box exhibits

MEDIUM

Chemistry>Physical Chemistry>Solid state>Ionic Solids and their Structures

The

FCC -

crystal contains how many atoms in each unit cell?

EASY

Chemistry>Physical Chemistry>Solid state>Ionic Solids and their Structures

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>Ionic Solids and their Structures

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>Ionic Solids and their Structures

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

A compound AB having formula weight = 6.023×Y AMU, has rock salt type structure and the closest AB distance is Y13 nm, where Y is an arbitrary number. The density of lattice is

Important Questions on Solid state

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A compound $AB$ having formula weight $= 6.023 \times Y AMU$ , has rock salt type structure and the closest AB distance is $Y^{\frac{1}{3}}$ nm, where $Y$ is an arbitrary number. The density of lattice is