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Which of the following is incorrect about interstitial compounds?

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Important Questions on Solid State

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Chemistry>Physical Chemistry>Solid State>Classification and Properties of Solids

Which of the following is NOT true about the amorphous solids?

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Chemistry>Physical Chemistry>Solid State>Classification and Properties of Solids

Give two differences between Crystalline solids and Amorphous solids.

EASY

Chemistry>Physical Chemistry>Solid State>Classification and Properties of Solids

Glass is

EASY

Chemistry>Physical Chemistry>Solid State>Classification and Properties of Solids

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

EASY

Chemistry>Physical Chemistry>Solid State>Classification and Properties of Solids

Which of the following statements is true with regards to crystalline solids?

EASY

Chemistry>Physical Chemistry>Solid State>Classification and Properties of Solids

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

(C a^{2 +})

and fluoride ion

(F^{-})

are

HARD

Chemistry>Physical Chemistry>Solid State>Classification and Properties of Solids

Which of the following statement is correct?

HARD

Chemistry>Physical Chemistry>Solid State>Classification and Properties of Solids

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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Chemistry>Physical Chemistry>Solid State>Classification and Properties of Solids

What is a vitreous state ?

HARD

Chemistry>Physical Chemistry>Solid State>Classification and Properties of Solids

Define Anisotropy. Distinguish between crystalline solids and amorphous solids.

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Chemistry>Physical Chemistry>Solid State>Classification and Properties of 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:

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Chemistry>Physical Chemistry>Solid State>Classification and Properties of Solids

Select the correct statements.
(A) Crystalline solids have long range order.
(B) Crystalline solids are isotropic.
(C) Amorphous solid are sometimes called pseudo solids.
(D) Amorphous solids soften over a range of
temperatures.
(E) Amorphous solids have a definite heat of fusion. Choose the most appropriate answer from the options given below.

EASY

Chemistry>Physical Chemistry>Solid State>Classification and Properties of Solids

The barrier potential of a p-n junction depends on:

(a)

type of semi-conductor material

(b)

amount of doping

(c)

temperature
Which one of the following is correct?

HARD

Chemistry>Physical Chemistry>Solid State>Classification and Properties of 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 _____.

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Chemistry>Physical Chemistry>Solid State>Classification and Properties of Solids

The contribution to the total current in a semiconductor, due to electrons and holes are

0.75

and

0.25

respectively. The drift velocity of electrons is

\frac{3}{2}

times that of holes at this temperature. Then the ratio between electron concentration and hole concentration is

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Chemistry>Physical Chemistry>Solid State>Classification and Properties of Solids

Among the following, which have highest melting point?

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Chemistry>Physical Chemistry>Solid State>Classification and Properties of Solids

An intrinsic semiconductor is converted into

n

-type extrinsic semiconductor by doping it with:-

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Chemistry>Physical Chemistry>Solid State>Classification and Properties of Solids

The material that soften on heating to finally flow like a liquid is _____.

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Chemistry>Physical Chemistry>Solid State>Classification and Properties of Solids

Given below are two statements. One is labelled as
Assertion $A$ and the other is labelled as Reason $R$ .
Assertion $A :$ Sharp glass edge becomes smooth on heating it up to its melting point.

Reason $R :$ The viscosity of glass decreases on melting.

Choose the most appropriate answer from the options given below.

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Chemistry>Physical Chemistry>Solid State>Classification and Properties of Solids

The amorphous form of silica is:

Which of the following is incorrect about interstitial compounds?

Important Questions on Solid State

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