Class 12 Chemistry Chapter 1 The Solid State MCQs | Class 12 Chemistry Chapter 1 The Solid State Multiple Choice Questions (MCQs) and Answers

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Questions
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

Answer: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

Answer:6.15 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):
A 2
B 1
C 4
D 6

Answer: 2
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

Answer: 282 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

Answer: 5.19 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

Answer:KBr
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

Answer:Frenkel 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

Answer:FeO
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

Answer:hep and ccp
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

Answer: arsenic
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

Answer: Low temperature
17 Which one of the following is non-crystalline or amorphous?
A Diamond
B Graphite
C Glass
D Common Salt

Answer: Glass
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

Answer:high pressure
19 How many chloride ions are surrounding sodium ion in sodium chloride crystal ?
A 4
B 6
C 8
D 12

Answer: 6
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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