Q.1. The material used in the solar cells contains
(A) Cs
(B) Si
(C) Sn
(D) Ti
Ans :- (B)
Q. 2. In the crystals of which of the following ionic compounds would you expect maximum distance between the centers of the cations and anions ?
(A) LiF
(B) CsF
(C) CsI
(D) LiI
Ans :- (C)
Q.3. How many kinds of space lattices are possible in a crystal ?
(A) 23
(B) 7
(C) 230
(D) 14
Ans :- (D)
Q.4. If ‘a’ is the edge length of a body cubic centred, then the distance between the atom at the corner and at the centre is
(A) 2a/√3
(B) 4a/√3
(C) √3a/4
(D) √3a/2
Ans :- (C)
Q.5. which among the following is not the property of a crystalline solid ?
(A) Anisotropic
(B) Isotropic
(C) Hard
(D) Deuse
Ans :- (B)
Q.6. The co-ordination number of Al in AlCl₃ is
(A) 2
(B) 4
(C) 6
(D) 8
Ans :- (C)
Q.7. Which of the following shows ferrmagnetism ?
(A) TiO₂
(B) CrO₂
(C) MnO
(D) Fe₃O₄
Ans :- (C)
Q.8. The effieiency of packing is 68% in
(A) hup structure
(B) ccp structure
(C) fcc structure
(D) bcc structure
Ans :- (D)
Q.9. Empty space in ccp lattice is
(A) 26%
(B) 45%
(C) 90%
(D) 30%
Ans :- (A)
Q.10. Co-ordination number of sodium ion Na⁺ in NaCl is
(A) four
(B) three
(C) six
(D) five
Ans :- (C)
Q.11. What is the co-ordination number of cl⁻ in NaCl crystal
(A) 8
(B) 6
(C) 4
(D) 3
Ans :- (B)
Q.12. The liquefied metal expanding on solidification is
(A) Ga
(B) Al
(C) Zn
(D) Cu
Ans :- (A)
Q.13. Which has no rotation of symmetry?
(A) hexagonal
(B) orthorhombie
(C) Cubic
(D) tridinic
Ans :- (D)
Q.14. The atom that present in the centre of BCC unit cell share with how many unit cells ?
(A) 1 unit cell
(B) 4 unit cells
(C) 3 unit cells
(D) 2 unit cells
Ans :- (A)
Q.15. The substance used in solar cell contains
(A) Cs
(B) Si
(C) Sn
(D) Ti
Ans :- (B)
Q.16. Frenked defect is observed in
(A) Sodium chloride
(B) Graphite
(C) Silver bromide
(D) Diamond
Ans :- (C)
Q.17. What is the co-ordination number of ions inrocksalt structure ?
(A) 1
(B) 3
(C) 5
(D) 6
Ans :- (D)
Q.18. Which of the following unit cell having maximum number of atoms ?
(A ) bcc
(B) hcp
(C) fcc
(D) cubic
Ans :- (B)
Q.19. The co-ordination number of crystal of the metals that form hexagonal close packed structure will be
(A) 12
(B) 8
(C) 4
(D) 6
Ans :- (A)
Q.20. 8:8 type of packing is present in
(A) MgF₂
(B) C₅Cl
(C) Kcl
(D) NaCl
Ans :- (B)
Q.21. The number of octahedral sites per sphere in fcc structure is
(A) 8
(B) 4
(C) 2
(D) 1
Ans :- (D)
Q.22. The packing fraction for a body centred cube is
(A) 0.42
(B) 0.53
(C) 0.68
(D) 0.82
Ans :- (C)
Q.23. Which of the following has frenkel defect ?
(A) Sodium chloride
(B) graphite
(C) Silver bromide
(D) diamond
Ans :- (C)
Q.24. Percentage of free space in bcc unit cell is
(A) 32%
(B) 34%
(C) 28%
(D) 30%
Ans :- (A)
Q.25. In which of the following pairs of structures are tetrahedral as well as octahedral voids respectively ?
(A) bcc and fcc
(B) hcp and simple cubic
(C) bcc and hup
(D) hcp and ccp
Ans :- (C)
Q.26. Which among the following is amorphous solid ?
(A) Graphite (c)
(B) Quartz Glass (SiO₂)
(C) Chrome Alum
(D) Silicon carbide (SiC)
Ans :- (B)
Q.27. Avogadro’s number (N) is equal to
(A) 6.023×10²⁴
(B) 6.023×10²³
(C) 6.023 ×10⁻²³
(D) 11.2
Ans :- (B)
Q.28. The number of octahedral voids per atom in a crystal lattice is
(A) 1
(B) 2
(C) 4
(D) 8
Ans :- (A)
Q.29. Which of the following represents hexagonal close packing arrangement in crystals ?
(A) ABABAB
(B) ABBABB
(C) ABCABC
(D) None of these
Ans :- (A)
Q.30. Which is a ferroelectric compound ?
(A) BaTiO₃
(B) K₄[fe(CN) ₆ ]
(C) Pb₂ O₃
(D) None of these
Ans :- (A)
Q.31. The number of atoms per unit cell of bcc structure is
(A) 1
(B) 2
(C) 4
(D) 6
Ans :- (B)
Q.32. The number of basic crystal system is
(A) 4
(B) 6
(C) 7
(D) 8
Ans :- (C)
Q.33. Which has hcp crystal structure ?
(A) NaCl
(B) C₅Cl
(C) Zn
(D) RbCl
Ans :- (C)
Q.34. The arrangement of Cl⁻ ions a Sodium chloride crystal lattices is
(A) fcc
(B) bcc
(C) fcc and bcc both
(D) none of these
Ans :- (A)
Q.35. The number of carbon atoms in the unit cell of diamond is
(A) 6
(B) 1
(C) 4
(D) 8
Ans :- (D)
Q.36. The number of octahedral voids in a cubic close packed structure is
(A) 1
(B) 3
(C) 2
(D) 4
Ans :- (D)
Q.37. Which of the following elements give a p-type semiconductor when doped with silicon ?
(A) Se
(B) Boron
(C) Ge
(D) As
Ans :- (B)
Q.38. Pure silicon is
(A) Conductor
(B) insulator
(C) Semiconductor
(D) none of these
Ans :- (B)
Q.39. Potassium crystallises in a
(A) face centred cubic lattice
(B) body centred cubic lattice
(C) simple cubic lattice
(D) orthorthombic lattice
Ans :- (B)
Q.40. Iodine is
(A) Ionic solid
(B) Atomic solid
(C) Molecular solid
(D) Covalent solid
Ans :- (C)
Q.41. For which unit cell, α=β=γ=90⁰ , a-b ≠ c
(A) Cubic
(B) Triclinic
(C) Hexagonal
(D) Tetragonal
Ans :- (D)
Q.42. Covalent solid is
(A) Rock salt
(B) ice
(C) Quartz
(D) dry ice
Ans :- (C)
Q.43. The electron in paramagnetic compound is
(A) Shared
(B) Unpaired
(C) Paired
(D) None
Ans :- (B)
Q.44. The good Conductor of heat and electricity is
(A) Anthracite coke
(B) Diamond
(C) Graphite
(D) Charcoal
Ans :- (C)
Q.45. In which unit cell the number of atoms is maximum ?
(A) bcc
(B) hcp
(C) fcc
(D) Cubic
Ans :- (C)
Q.46. Graphite is
(A) molecular solid
(B) covalent solid
(C) ionic solid
(D) metallic solid
Ans :- (B)
Q.47. In fcc cubic call, an atom at the face centre is shared by
(A) 6 unit cells
(B) 1 unit cells
(C) 2 unit cells
(D) 4 unit cells
Ans :- (C)
Q.48. Fe₃O₄ Solid is
(A) paramagnetic
(B) Diamagnetic
(C) ferrimagnetic
(D) none
Ans:- (C)
Q.49. The structure of sodium chloride is
(A) Body centred cubic
(B) face centred cubic
(C) square planer
(D) None of these
Ans :- (B)
Q.50. The highest ferromagnetism is found in
(A) Fe
(B) Ni
(C) Co
(D) None of these
Ans :- (A)