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Free download in PDF Class 12 Chemistry Chapter 1 The Solid State Objective Type Questions 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)
In Zinc blende structure
[A]
zinc ions occupy half of the tetrahedral sites
[B]
each Zn2- ion is surrounded by six sulphide ions
[C]
each S2- ion is surrounded by six Zn2+ ions
[D]
it has fee structure
Answer: each S2- ion is surrounded by six Zn2+ ions
(2)
A unit cell of BaCl2 (fluorite structure) is made up of
[A]
four Ba2+ ions and four Cl– ions
[B]
four Ba2- ions and eight Cl– ions
[C]
eight Ba² ions and four Cl– ions
[D]
four Ba² ions and six Cl– ions
Answer: four Ba2- ions and eight Cl– ions
(3)
Alkali halids do not show Frenkel defect because
[A]
cations and anions have almost equal size
[B]
there is a large difference in size of cations and anions
[C]
cations and anions have low coordination number
[D]
anions cannot be accommodated in voids
Answer: cations and anions have almost equal size
(4)
The coordination number of Y will be in the XY types of crystal:
(5)
The fraction of the total volume occupied by the atoms present in a simple cube is
[A]
π4
[B]
π6
[C]
π3√2
[D]
π4√2
(6)
Edge length of unit cell of chromium metal is 287 pm with bcc arrangement. The atomic radius is of the order
[A]
287 pm
[B]
574 pm
[C]
124.27 pm
[D]
All of the given
(7)
How many unit cells are divided equally in a face-centred cubic lattice?
(8)
A crystalline solid:
[A]
changes abruptly from solid to liquid when heated
[B]
has no definite melting point
[C]
undergoes deformation of its geometry easily
[D]
has irregular 3-dimensional arrangements
Answer: changes abruptly from solid to liquid when heated
(9)
In a simple cubic, body-centred cubic and face-centred cubic structure, the ratio of the number of atoms present is respectively
[A]
8:1:6
[B]
1:2:4
[C]
4:2:1
[D]
4:2:3
(10)
Na and Mg crystallize in crystals of bcc and fcc form respectively and then the amount of Na and Mg atoms present in their respective crystal unit cells is:
[A]
4 and 2
[B]
9 and 14
[C]
14 and 9
[D]
2 and 4
(11)
Ferrous oxide has a cubic structure and each unit cell edge is 5.0Ao. Assuming the oxide density is 4.0g / cm3, the amount of Fe2+ and O2- ions in each unit cell will then be
[A]
four Fe2+ and four O2-
[B]
two Fe2+ and four O2-
[C]
four Fe2+ and two O2-
[D]
three Fe2+ and three O2-
Answer: four Fe2+ and four O2-
(12)
Each of the following solids shows the Frenkel defect except
[A]
ZnS
[B]
AgBr
[C]
AgI
[D]
KCl
(13)
Schottky defect in a crystal is observed when
[A]
The ion leaves its normal position and occupies an interstitial location
[B]
the unequal number of cation and anions are missing from the lattice
[C]
the density of the crystal increases
[D]
an equal number of cations and anions are missing from the lattice
Answer: an equal number of cations and anions are missing from the lattice
(14)
Copper crystalline in FCC with a unit cell length of 361pm. What is the radius of a copper atom?
[A]
128pm
[B]
157pm
[C]
181pm
[D]
108pm
(15)
The total no of voids in 0.5 mol of a compound forming hexagonal close-packed structure are:
[A]
6.022 × 1023
[B]
3.011 × 1023
[C]
9.033 × 1023
[D]
4.516 × 1023
(16)
For the orthorhombic system, axial ratios are a ≠ b ≠ c and the axial angles are:
[A]
α = β = γ ≠ 90o
[B]
α ≠ β ≠ γ ≠ 90o
[C]
α = β = γ = 90o
[D]
α ≠ β ≠ γ = 90o
(17)
Lithium has a bcc structure. Its density is 530 kg m–3 and its atomic mass is 6.94 g mol–1. Calculate the edge length of a unit cell of Lithium metal (NA = 6.02 × 1023 mol–1)
[A]
527 pm
[B]
264 pm
[C]
154 pm
[D]
352 pm
(18)
The ionic radii of A+ and B– ions are 0.98 ×10–10 m and 1.81 × 10–10 m. The coordination number of each ion in AB is
(19)
Which among the following solids crystalises as a face centred cube?
[A]
Iron
[B]
Rubidium
[C]
Uranium
[D]
Platinum
(20)
Volume occupied by single CsCl ion pair in a crystal is 7.014 × 10–23 cm3. The smallest Cs – Cs internuclear distance is equal to length of the side of the cube corresponding to volume of one CsCl ion pair. The smallest Cs to Cs internuclear distance is nearly
[A]
4.4 Å
[B]
4.3 Å
[C]
4 Å
[D]
4.5 Å
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