The Solid State MCQs with answers

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Q. Which one of the following is non-crystalline or amorphous?
  • (A) Diamond
  • (B) Graphite
  • (C) Glass
  • (D) Common Salt
πŸ’¬ Discuss
βœ… Correct Answer: (C) Glass
Q. 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
πŸ’¬ Discuss
βœ… Correct Answer: (B) high pressure
Q. How many chloride ions are surrounding sodium ion in sodium chloride crystal?
  • (A) 4
  • (B) 6
  • (C) 8
  • (D) 12
πŸ’¬ Discuss
βœ… Correct Answer: (B) 6
Q. 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
πŸ’¬ Discuss
βœ… Correct Answer: (B) only octahedral sites are occupied
Q. 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
πŸ’¬ Discuss
βœ… Correct Answer: (D) 144 pm
Q. 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
πŸ’¬ Discuss
βœ… Correct Answer: (C) 6.15 g cm-3
Q. How many lithium atoms are present in a unit cell with edge length 3.5 Γ… and density 0.53 g cm-3? (Atomic mass of Li = 6.94):
  • (A) 1
  • (B) 2
  • (C) 4
  • (D) 6
πŸ’¬ Discuss
βœ… Correct Answer: (B) 2
Q. The distance between Na- and CL- ions in NaCl with a density 2.165 g cm-3 is
  • (A) 564 pm
  • (B) 234 pm
  • (C) 282 pm
  • (D) 538 pm
πŸ’¬ Discuss
βœ… Correct Answer: (C) 282 pm
Q. 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
πŸ’¬ Discuss
βœ… Correct Answer: (B) hep and ccp
Q. 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
πŸ’¬ Discuss
βœ… Correct Answer: (C) The density of the crystal remains unchanged
Q. 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
πŸ’¬ Discuss
βœ… Correct Answer: (C) some lattice sites are vacant
Q. To get n-type of semiconductor, germanium should be doped with
  • (A) gallium
  • (B) aluminium
  • (C) boron
  • (D) arsenic
πŸ’¬ Discuss
βœ… Correct Answer: (D) arsenic
Q. 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
πŸ’¬ Discuss
βœ… Correct Answer: (C) each S2-ion is surrounded by six Zn2+ ions
Q. 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
πŸ’¬ Discuss
βœ… Correct Answer: (B) four Ba2- ions and eight Cl- ions
Q. 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
πŸ’¬ Discuss
βœ… Correct Answer: (A) cations and anions have almost equal size
Q. The coordination number of Y will be in the XY types of crystal:
  • (A) 4
  • (B) 6
  • (C) 8
  • (D) 12
πŸ’¬ Discuss
βœ… Correct Answer: (B) 6
Q. The fraction of the total volume occupied by the atoms present in a simple cube is
  • (A) Ο€4
  • (B) Ο€6
  • (C) Ο€3√2
  • (D) Ο€4√2
πŸ’¬ Discuss
βœ… Correct Answer: (B) Ο€6
Q. 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) 143.5 pm
πŸ’¬ Discuss
βœ… Correct Answer: (C) 124.27 pm
Q. Fe3O4 (magnetite) is an example of
  • (A) normal spinel structure
  • (B) inverse spinel structure
  • (C) fluoride structure
  • (D) anti fluorite structure
πŸ’¬ Discuss
βœ… Correct Answer: (B) inverse spinel structure
Q. 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
πŸ’¬ Discuss
βœ… Correct Answer: (B) Frenkel defect
Q. Silver halides generally show
  • (A) Schottky defect
  • (B) Frenkel defect
  • (C) Both Frenkel and Schottky defects
  • (D) cation excess defect
πŸ’¬ Discuss
βœ… Correct Answer: (C) Both Frenkel and Schottky defects
Q. Which of the following will have metal deficiency defect?
  • (A) NaCl
  • (B) KCl
  • (C) ZnO
  • (D) FeO
πŸ’¬ Discuss
βœ… Correct Answer: (D) FeO
Q. 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
πŸ’¬ Discuss
βœ… Correct Answer: (C) group 13 elements
Q. 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
πŸ’¬ Discuss
βœ… Correct Answer: (B) Low temperature

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Table of contents

  1. Which one of the following is non-crystalline or amorphous?
  2. NaCl typecrystal (with coordination no. 6 : 6) can be converted into CsCl type crystal (with coordi
  3. How many chloride ions are surrounding sodium ion in sodium chloride crystal?
  4. In NaCl structure
  5. The edge length of fee cell is 508 pm. If radius of cation is 110 pm, the radius of anion is
  6. The density of a metal which crystallises in bcc lattice with unit cell edge length 300 pm and mola
  7. How many lithium atoms are present in a unit cell with edge length 3.5 Γ… and density 0.53 g cm
  8. The distance between Na- and CL- ions in NaCl with a density 2.165 g cm-3
  9. In which pair most efficient packing is present?
  10. What is the effect of Frenkel defect on the density of ionic solids?
  11. In a Schottky defect
  12. To get n-type of semiconductor, germanium should be doped with
  13. In Zinc blende structure
  14. A unit cell of BaCl2 (fluorite structure) is made up of
  15. Alkali halids do not show Frenkel defect because
  16. The coordination number of Y will be in the XY types of crystal:
  17. The fraction of the total volume occupied by the atoms present in a simple cube is
  18. Edge length of unit cell of chromium metal is 287 pm with bcc arrangement. The atomic radius is of t
  19. Fe3O4 (magnetite) is an example of
  20. What type of stoichiometric defect is shown by ZnS?
  21. Silver halides generally show
  22. Which of the following will have metal deficiency defect?
  23. p-type semiconductors are formed When Si or Ge are doped with
  24. Which of the following conditions favours the existence of a substance in the solid state?

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