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Free download in PDF Class 12 Chemistry Chapter 1 The Solid State Multiple Choice Questions (MCQs) and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams like NEET, AIIMS, JIPMER etc. These short solved questions or quizzes are provided by Gkseries./p>
(1)
The edge length of fee cell is 508 pm. If radius of cation is 110 pm, the radius of anion is
[A]
110 pm
[B]
220 pm
[C]
285 pm
[D]
144 pm
(2)
The density of a metal which crystallises in bcc lattice with unit cell edge length 300 pm and molar mass 50 g mol-1 will be
[A]
10 g cm-3
[B]
14.2 g cm-3
[C]
6.15 g cm-3
[D]
9.3 2 g cm-3
(3)
How many lithium atoms are present in a unit cell with edge length 3.5 Å and density 0.53 g cm-3? (Atomic mass of Li = 6.94):
(4)
The distance between Na– and CL– ions in NaCl with a density 2.165 g cm-3 is
[A]
564 pm
[B]
282 pm
[C]
234 pm
[D]
538 pm
(5)
An element with atomic mass 100 has a bcc structure and edge length 400 pm. The density of element is
[A]
10.37 g cm-3
[B]
5.19 g cm-3
[C]
7.29 g cm-3
[D]
2.14 g cm-3
(6)
Fe3O4 (magnetite) is an example of
[A]
normal spinel structure
[B]
inverse spinel structure
[C]
fluoride structure
[D]
anti fluorite structure
Answer: inverse spinel structure
(7)
Which of the following crystals does not exhibit Frenkel defect?
[A]
AgBr
[B]
AgCl
[C]
KBr
[D]
ZnS
(8)
What type of stoichiometric defect is shown by ZnS?
[A]
Schottky defect
[B]
Frenkel defect
[C]
Both Frenkel and Schottky defects
[D]
Non-stoichiometric defect
(9)
Silver halides generally show
[A]
Schottky defect
[B]
Frenkel defect
[C]
Both Frenkel and Schottky defects
[D]
cation excess defect
Answer: Both Frenkel and Schottky defects
(10)
Which of the following will have metal deficiency defect?
[A]
NaCl
[B]
FeO
[C]
KCl
[D]
ZnO
(11)
In which pair most efficient packing is present?
[A]
hep and bcc
[B]
hep and ccp
[C]
bcc and ccp
[D]
bcc and simple cubic cell
(12)
What is the effect of Frenkel defect on the density of ionic solids?
[A]
The density of the crystal increases
[B]
The density of the crystal decreases
[C]
The density of the crystal remains unchanged
[D]
There is no relationship between density of a crystal and defect present in it
Answer: The density of the crystal remains unchanged
(13)
In a Schottky defect
[A]
an ion moves to interstitial position between the lattice points
[B]
electrons are trapped in a lattice site
[C]
some lattice sites are vacant
[D]
some extra cations are present in interstitial space
Answer: some lattice sites are vacant
(14)
To get n-type of semiconductor, germanium should be doped with
[A]
gallium
[B]
arsenic
[C]
aluminium
[D]
boron
(15)
p-type semiconductors are formed When Si or Ge are doped with
[A]
group 14 elements
[B]
group 15 elements
[C]
group 13 elements
[D]
group 18 elements
Answer: group 13 elements
(16)
Which of the following conditions favours the existence of a substance in the solid state?
[A]
High temperature
[B]
Low temperature
[C]
High thermal energy
[D]
Weak cohesive forces
(17)
Which one of the following is non-crystalline or amorphous?
[A]
Diamond
[B]
Graphite
[C]
Glass
[D]
Common Salt
(18)
NaCl typecrystal (with coordination no. 6 : 6) can be converted into CsCl type crystal (with coordination no. 8 : 8) by applying
[A]
high temperature
[B]
high pressure
[C]
high temperature and high pressure
[D]
low temperature and low pressure
(19)
How many chloride ions are surrounding sodium ion in sodium chloride crystal ?
(20)
In NaCl structure
[A]
all octahedral and tetrahedral sites are occupied
[B]
only octahedral sites are occupied
[C]
only tetrahedral sites are occupied
[D]
neither octahedral nor tetrahedral sites are occupied
Answer: neither octahedral nor tetrahedral sites are occupied
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