do not undergo clean cleavage when cut with a knife.

undergo clean cleavage when cut with a knife.

possess orderly arrangement over long distances.

MCQ Questions for Class 12 Engineering Chemistry The Solid State Quiz 2

Total number of layer between a distance of

$14R \sqrt { \frac { 2 }{ 3 } }$ in help unit cell ?

0%
5
0%
8
0%
6
0%
None of these

Explanation

(Refer to Image)

In a distance of

$h=4r \sqrt {\cfrac {2}{3}}$ , there are

$3$ layers.

Hence in a distance of

$h=14r\sqrt {\cfrac {2}{3}}$ , there will be approximately

$10$ layers.

1221369_1119956_ans_33216d412159461f8bdc6e3626ffbc75.JPG

Packing fraction in a body-centred cubic cell of crystals is

0%
$\frac{{\sqrt 3 }}{8}\pi$
0%
$\frac{\pi }{6}$
0%
$\frac{{\sqrt 2 }}{6}\pi$
0%
$\frac{1}{{2\sqrt 2 }}\pi$

In case of cubic system, the number of types of space lattices?

0%
3
0%
7
0%
14
0%
12

Percentage of free space in cubic close packed structure and in body centred packed structure are respectively ___________.

0%
$30 \% \quad and \quad 26\%$
0%
$26 \% \quad and \quad 32\%$
0%
$48 \% \quad and \quad 48\%$
0%
$32 \% \quad and \quad 26\%$

A metallic element crystallizes into a lattice containing a sequence of layers of AB AB AB....Any packing of spheres leaves out voids in the lattice. The empty space in percentage by volume in this lattice is:

0%
26%
0%
32%
0%
20%
0%
30%

Which of the following is not related to amorphous solids?

0%
They do not have sharp melting points
0%
They are rigid and hard
0%
They are not bound by plane surfaces
0%
They give diffraction bands

Which of the following molecule has higher lattice energy?

0%
NaCl.
0%
$Mg_1N_3$ .
0%
Both (A) and (B) have equal lattice energy.
0%
None of these

Explanation

Lattice energy of a crystal is defined as the energy required to break an ionic crystal into its constituent ions in an isolated gaseous state. More ionic the compound is stronger will be its ionic bond and higher will be its lattice energy.

In $MgN_3$ the charge on the ionic species is greater than $NaCl$ . So, ionic interactions in $MgN_3$ will be stronger.

So, lattice energy of

$MgN_3$ is greater than

$NaCl$

Crystals have 'vacant sites' or 'defects' in them. When light strikes a photographic silver bromide paper, silver atoms move in through these defects to:

0%
develop the film
0%
form tiny clumps of silver atoms
0%
form negative images
0%
form a colour image

Explanation

When light strikes a photographer $(AgBr)$ paper, it gives energy to the electrons present in the film. These energetic electrons when strike silver ions turn them to silver atoms. So eventually, ions leave their lattice site and occupy interstitial sites. Since silver atoms are black in color so whenever light strikes a silver ion the photographic film will turn black.

The arrangement of the first two layers, one above the other, in hcp and ccp arrangement is:

0%
exactly the same in both cases
0%
partly same and partly different
0%
different from each other
0%
nothing definite

Which of the following statements are true for glasses?

0%
They are amorphous solids.
0%
They are supercooled liquids.
0%
They have long range order.
0%
Both A and B are correct.

The maximum percentage of available volume that can be filled in a face centred cubic system by an atom is:

0%
$74\%$
0%
$68\%$
0%
$34\%$
0%
$26\%$

Explanation

Face-centered cubic cells have

$74\%$ packaging efficiency for spheres or ions of equal diameter. Some examples of FCC arrangements are aluminum, copper and buckminsterfullerenes-C-60 (buckyballs) etc.

Glass is:

0%
Supercooled liquid
0%
Crystalline solid
0%
Liquid crystal
0%
Amorphous solid

In which of the following arrangements, a metal would have the least density?

0%
BCC
0%
CCP
0%
HCP
0%
SC

Explanation

Density is directly proportional to the packing efficiency of a unit cell.

The packing efficiency of a simple cubic lattice is 52.4%.

Hence, Simple cubic lattice (SC) has the least packing efficiency among other unit cells.

Option

$D$ is correct.

Which of the following is not a crystalline solid?

0%
Potassium Chloride
0%
Caesium Chloride
0%
Glass
0%
Rhombic sulphur

Amorphous solids:

0%
possess sharp melting points.
0%
undergo clean cleavage when cut with a knife.
0%
do not undergo clean cleavage when cut with a knife.
0%
possess orderly arrangement over long distances.

Potassium crystallizes in a:

0%
face-centred cubic lattice
0%
body-centred cubic lattice
0%
simple cubic lattice
0%
orthorhombic lattice

Crystal of sodium chloride belong to the ______ system.

0%
orthorhombic
0%
cubic
0%
trigonal
0%
monoclinic

How many kinds of space lattices are possible in a crystal?

0%
$7$
0%
$23$
0%
$30$
0%
$14$

In a hexagonal close packed (hcp) structure of spheres, the fraction of the volume occupied by the spheres is A. In a cubic close packed structure, the fraction is B. The relation between A and B is:

0%
$A=B$
0%
$A > B$
0%
$A < B$
0%
None of the above

The crystalline sodium has body centred cubic unit cell with edge length equal to

$0.424$ nm at

$298$ K. The density (in kg m

$^{-3}$ ) of sodium metal at

$298$ K is:

0%
$1.002\times 10^{3}$
0%
$1.002\times 10^{-3}$
0%
$2\times 10^{3}$
0%
$2\times 10^{-3}$

Explanation

The formula for calculating density is given below:

$d=\dfrac { zM }{ { N }_{ A }{ a }^{ 3 } }$

$d=\dfrac { 2 \times 23 }{ 6 \times 10^ {23} \times (0.424 \times 10 ^ {-9} )^3}$

$\implies d=1.002\times 10^{3}$ kg m

$^{-3}$

The density of metal which crystallise in

$bcc$ lattice with unit cell edge length

$300$ pm and molar mass

$50$ g mol

$^{-1}$ will be:

0%
$10$ g cm $^{-3}$
0%
$14.2$ g cm $^{-3}$
0%
$6.15$ g cm $^{-3}$
0%
$9.31$ g cm $^{-3}$

Explanation

Theoretical density of crystal, $\rho = \cfrac {nM}{N_o a^3} \ g/cm^3$

Given for bcc $n=2; \ a=300 \times 10^{-10} \ cm, \ M=50 \ g$

$\therefore \rho = \cfrac {2 \times 50}{6.022 \times 10^{23} \times (300)^3 \times (10^{-10})^3}$

$= 6.15 \ g/cm^3$

Hence, Option "C" is the correct answer.

An element with atomic mass 100 has a

$bcc$ structure and edge length 400 pm. The density of element is:

0%
10.37 g $cm^{-3}$
0%
5.19 g $cm^{-3}$
0%
7.29 g $cm^{-3}$
0%
2.14 g $cm^{-3}$

Explanation

Theoretical density of crystal, $\rho = \cfrac {nM}{N_o a^3} \ g/cm^3$

Given for bcc $n=2; \ a=400 \times 10^{-10} \ cm, \ M=100 \ g$

$\therefore \rho = \cfrac {2 \times 100}{6.022 \times 10^{23} \times (400)^3 \times (10^{-10})^3}$

$= 5.19 \ g/cm^3$

Hence, Option "B" is the correct answer.

A unit cell of sodium chloride has four formula units. The edge length of the unit cell is 0.564 nm. What is the density of sodium chloride?

0%
3.89 g $cm^{-3}$
0%
2.16 g $cm^{-3}$
0%
3 g $cm^{-3}$
0%
1.82 g $cm^{-3}$

Explanation

Theoretical density of crystal, $\rho = \cfrac {nM}{N_o a^3} \ g/cm^3$

For NaCl, $n=4, \ M=58.5 \ g, \ a=0.564 \times 10^{-7} \ cm$

$\therefore \rho = \cfrac {4 \times 58.5}{6.022 \times 10^{23} \times (0.564)^3 \times 10^{-21}}=2.16 \ g/cm^3$

Hence, the correct option is $\text{B}$

Match the List -I (reduction process) with List - II (element).

List -I (reduction process)	List - II (element)
(P) Number of occupied O.V. in diamond unit -cell	(1) 2
(Q) Coordination no.of $S^{2-}$ in zinc blend structure	(2) 6
(R) $_{ 92 }^{ 238 }{ U\rightarrow _{ 82 }^{ 214 }{ Pb } }$ , number of $\alpha$ - particles given out	(3) 4
(S) $_{ 13 }^{ 29 }{ Al }\rightarrow _{ 13 }^{ 27 }{ Al }$ , number of $\beta$ particles given out	(4) 0

0%
P-4 Q-2 R-3 S-1
0%
P-2 Q-4 R -1 S-3
0%
P-4 Q-3 R -2 S-1
0%
P-2 Q-4 R -3 S-1

Number of atoms per unit cell, if atoms are present at the corner of unit cell and 2 atoms at each body diagonal

0%
9
0%
10
0%
6
0%
4

Among the following, the compound with high lattice energy is

0%
NaCl
0%
${\text{MgC}}{{\text{l}}_{\text{2}}}$
0%
KCl
0%
CsF

Which pair is correct order of lattice energy?

0%
KCl > MgO
0%
AIN > MgO
0%
CaO > BaO
0%
${\text{MgC}}{{\text{O}}_{\text{3}}} > {\text{CaC}}{{\text{O}}_{\text{3}}}$

Two metals A and B crystallize in

$bcc$ and

$fcc$ type structures. The ratio of number of atoms of A and B present in unit cell of their crystals is

0%
0.5
0%
1
0%
2
0%
4

A unit cell of diamond consists of ______.

0%
6 units
0%
4 units
0%
8 units
0%
10 units.

What is the C.N. of a sphere in square packing in 2-D?

0%
4
0%
6
0%
12
0%
1

Rank of simple unit cell is:

0%
1
0%
2
0%
4
0%
6

Two ions

${ A }^{ + }$ and

${ B }^{ - }$ have radii of

$0.88\overset { \circ }{ A }$ and

$2\overset { \circ }{ A }$ respectively. What will be the type of crystal?

0%
fcc
0%
bcc
0%
Simple cubic
0%
None of these

Packing fraction in 2-D hexagonal packing is

0%
0.32
0%
0.68
0%
0.91
0%
0.78

If sodium metal crystallizes in body centered cubic lattice and unit cell of sodium has edge length of 4.29

$A^0$ , then what is the radius of sodium?

0%
$1.86 A^0$
0%
$3.22A^0$
0%
$5.72 A^0$
0%
$0.93 A^0$

The packing fraction in 2-D square packing is equal to:

0%
0.91
0%
0.78
0%
0.32
0%
0.68

The coordination number of tetrahedral void:

0%
3
0%
4
0%
6
0%
2

The packing efficiency of a simple cubic crystal with an interstitial atom exactly fitting at the body center is:

0%
$0.48$
0%
$0.52$
0%
$0.73$
0%
$0.91$

AAA type packing in 3D has a unit cell as :

0%
primitive
0%
FCC
0%
BCC
0%
CCP

The percentage of empty space in simple cubic unit cell:

0%
52%
0%
42%
0%
48%
0%
68%

A metallic element has simple cubic arrangement. The number of unit cells in 100 g of this metal

$(edge\ length\ = 288\ pm,\ density\ =\ 7.2\ g\ { cm }^{ -3 })\ are\ 5.8\times { 10 }^{ 23 }$ . The total number of atoms in 100 g of the metal is:

0%
$5.8\times { 10 }^{ 24 }$
0%
$5.8\times { 10 }^{ 23 }$
0%
$0.58\times { 10 }^{ 23 }$
0%
$58\times { 10 }^{ 24 }$

The percentage of empty space and coordination number in the unit cell of simple cubic lattice is:

0%
$47.6,6$
0%
$52.4,6$
0%
$47.6,8$
0%
$32,8$

In an FCC unit cell, atoms are numbered as shown below.The atoms not touching each other are:
(Atom numbered 3 is face centre of front face).

0%
3 & 4
0%
1 & 3
0%
1 & 2
0%
2 & 4

The increasing order of the crystal field splitting power of same common lingands is:

0%
${ H_2O}<{OH}^-<{ Cl }^{ - }<{ F}^{ - }<{ CN }^{ - }$
0%
${ H }_{ 2 }O<{ Cl }^{ - }<{ OH }^{ - }<{ CN}^{ - }<{ F}^{ - }$
0%
${ CN }^{ - }<{ H }_{ 2 }O<{ OH }^{ - }<{ F }^{ - }<{ Cl }^{ - }$
0%
${ Cl }^{ - }<{ F}^{ - }<{ OH }^{ - }<{ H_2O }<{ CN}^-$

The one that is extensively used as a piezoeletric material is:

0%
Quartz
0%
Amorphous silica
0%
Mica
0%
Tridymic

Which of the following cannot be regarded as molecular solid?

0%
$SiC$
0%
$AlN$
0%
$Diamond$
0%
$All\ of\ the\ above$

Explanation

Silicon carbide

$(SiC)$ , Aluminium nitride

$(AlN)$ , and diamond are examples of network atomic solids as they have three-dimensional structure.

Hence the correct option is D.

Which of the following correctly describes the structure of

$CaF_2$ ?

0%
$CN\quad of\quad { Ca }^{ 2+ }=\quad 8,\quad CN\quad of\quad F^-\quad =\quad 4,4\quad Ca^{ 2+ }\quad and\quad 8\quad F^-\quad per\quad unit\quad cell\quad$
0%
$CN\quad of\quad { Ca }^{ 2+ }=\quad 4,\quad CN\quad of\quad F^-\quad =\quad 8,8\quad Ca^{ 2+ }\quad and\quad 4\quad F^-\quad per\quad unit\quad cell\quad$
0%
$CN\quad of\quad { Ca }^{ 2+ }=\quad 4,\quad CN\quad of\quad F^-\quad =\quad 8,4\quad Ca^{ 2+ }\quad and\quad 8\quad F^-\quad per\quad unit\quad cell\quad$
0%
$CN\quad of\quad Ca^{ 2+ }\quad =\quad 8,\quad CN\quad of\quad F^{ - }=4,8\quad Ca^{2+}\quad and\quad 4\quad F^-\quad per\quad unit\quad cell\quad$

Calcium metal crystallises in fcc lattice with edge length 556 pm. Calculate the density of metal.

0%
1.5455
0%
3.992
0%
1.00
0%
5.00

A compound has a BCC unit cell with an edge length of 10A. If the density is 2

$g/cm^{3}$ then the molar mass of the compound is

0%
600
0%
300
0%
350
0%
250

Which of the following is/are pseudo solids?
I.

$KCl$
II. Barium chloride dihydrate
III. Rubber
IV. The solid cake left after the distillation of coal tar

0%
I, III
0%
II, III
0%
III, IV
0%
only III

How many numbers of atoms per unit cell in the following unit cell?

0%
5
0%
3
0%
2
0%
4

CBSE Questions for Class 12 Engineering Chemistry The Solid State Quiz 2 - MCQExams.com

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Practice Class 12 Engineering Chemistry Quiz Questions and Answers

CBSE Questions for Class 12 Engineering Chemistry The Solid State Quiz 2 - MCQExams.com

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Practice Class 12 Engineering Chemistry Quiz Questions and Answers

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