1. An example for amorphous solid is
(A) NaCl (B) Diamond (C) Glass (D) Water
2. An array of points which describe the three dimensional arrangement of particles in a crystal structure is called
(A) Space lattice (B) Unit cell (C) Lattice parameter (D) Primitive cell
3. A crystal structure is formed by associating with every lattice point a unit assembly of atoms or molecules identical in composition. This unit assembly is called
(A) Unit cell (B) Bravais lattice (C) Basis (D) Interfacial angle
4. Which one of the following is true?
(A) Lattice + Basis = crystal structure (B) lattice - Basis = crystal structure (C) lattice + crystal structure = Basis (D) Basis + crystal structure = lattice
5. Lattice points are equivalent in
(A) Bravais lattice (B) Non-Bravais lattice (C) Amorphous solids (D) None of these
6. The smallest portion of the crystal which can generate the complete crystal by repeating its own dimensions in various directions is called
(A) Lattice parameter (B) Unit cell (C) Basis (D) Single crystal
7. The position vector R for any lattice point in a space lattice can be written as
(A) R= n1a+n2b+n3c (B) R= n1a-(n2b+n3c) (C) R= n1a+n2b (D) R= n1+n2+n3
8. The three basis vectors and the three interfacial angles, form a set of six parameters that define the unit cell, and are called
(A) Bravais lattice (B) Primitive cells (C) non primitive cells (D) None of these
9. Unit cell with minimum volume is known as
(A) Primitive cell (B) Volume cell (C) Non primitive cell (D) Quantum dot
10. The number of Bravais lattices possible in nature
(A) 7 (B) 3 (C) 14 (D) Infinite
11. For a cubic crystal,
(A) a=b=c (B) a=b≠c (C) a≠b≠c (D) α=β=g≠ 900
12. Simple, base centered, body centered and face centered configuration possible for
(A) Orthorhombic (B) Rhombohedral (C) Triclinic (D) Monoclinic
13. Lattice planes are represented by
(A) Lattice parameters (B) Packing fraction (C) Miller indices (D) Interfacial angles
14. The miller indices of the plane parallel to y and z axes
(A) (100) (B) (001) (C) (010) (D) None of these
15. The miller indices of a plane with intercepts a, b/2, 3c in a simple cubic unit cell is
(A) (361) (B) (123) (C) (962) (D) (633)
16. The interplanar spacing dhkl is given by,
17. The interplanar spacing for (101) planes of a cubic crystal with lattice parameter 4 Å is
(A) 2.83Å (B) 5.68Å (C) 4Å (D) 2Å
18. The total number of atoms per unit cell in face centered cubic
(A) 4 (B) 6 (C) 8 (D) 12
19. Co-ordination number of body centered cubic lattice
(A) 6 (B) 8 (C) 12 (D) 2
20. Relation between atomic radius and the lattice constant in face centered cubic lattice
(A) a = 2R (B) a = (4/Ö3) R (C) a = 2Ö2 R (D) None of these
21. The interplanar spacing of (111) planes is 5Å for a fcc crystal. Its atomic radius is
(A)3.06Å (B) 3.86Å (C) 4.13Å (D) None of these
22. Expression for packing factor is
(A) n (4/3 pR3) / a3 (B) n (4/3 pa3) / R3 (C) (4/3 pR3) / a3 (D) n (4/3 pR3)
23. Packing fraction in simple cubic lattice is
(A) 1 (B) 0.52 (C)0.68 (D) 0.74
24. Which one of the following represents lattice parameter of a cubic crystal?
(A) (nM/rNA) (B) (nM/rNA)1/3 (C) (nM/rNA)3 (D) (n NA)/rM1/3
25. The lattice parameter of a cubic crystal is 3.57Å. If atomic weight is 12.01, density of the material is
(A) 3508 kg/m3 (B) 3508 g/cc (C) 4123 Kg/m3 (d) None of these
26. Which of the following is not crystallizing in fcc structure?
(A) Aluminium (B) NaCl (C) Diamond (D) Quartz
27. Lattice constant of NaCl crystal is
(A) (4/Ö3) R (B) 2Ö2 R (C) (8/Ö3) R (D) 2R
28. The number of molecules per unit cell in NaCl
(A) 1 (B) 2 (C) 4 (D) 8
29. The number of atoms per unit cell in Diamond
(A) 1 (B) 2 (C) 4 (D) 8
30. The coordination number of NaCl
(A) 4 (B) 6 (C) 8 (D) 12
31. The coordination number of diamond
(A) 4 (B) 6 (C) 8 (D) 12
32. Bragg’s law is given by
(A) 2d cosq = nl (B) 2d sinq = nl (C) d sinq = nl (D) 2lsinq = nd
33. When the crystal turns through q, ionization chamber of Bragg’s X-ray spectrometer turns through an angle
(A) q (B) 2q (C) q/2 (D) q2
34. X-rays of wavelength 0.58Å is incident on the plane (132) of NaCl which results in the 2nd order diffraction maxima taking the lattice spacing 3.81Å. Glancing angle in this case is
(A) 34.730 (B) 32.280 (C) 29.340 (D) None of these
(A) NaCl (B) Diamond (C) Glass (D) Water
2. An array of points which describe the three dimensional arrangement of particles in a crystal structure is called
(A) Space lattice (B) Unit cell (C) Lattice parameter (D) Primitive cell
3. A crystal structure is formed by associating with every lattice point a unit assembly of atoms or molecules identical in composition. This unit assembly is called
(A) Unit cell (B) Bravais lattice (C) Basis (D) Interfacial angle
4. Which one of the following is true?
(A) Lattice + Basis = crystal structure (B) lattice - Basis = crystal structure (C) lattice + crystal structure = Basis (D) Basis + crystal structure = lattice
5. Lattice points are equivalent in
(A) Bravais lattice (B) Non-Bravais lattice (C) Amorphous solids (D) None of these
6. The smallest portion of the crystal which can generate the complete crystal by repeating its own dimensions in various directions is called
(A) Lattice parameter (B) Unit cell (C) Basis (D) Single crystal
7. The position vector R for any lattice point in a space lattice can be written as
(A) R= n1a+n2b+n3c (B) R= n1a-(n2b+n3c) (C) R= n1a+n2b (D) R= n1+n2+n3
8. The three basis vectors and the three interfacial angles, form a set of six parameters that define the unit cell, and are called
(A) Bravais lattice (B) Primitive cells (C) non primitive cells (D) None of these
9. Unit cell with minimum volume is known as
(A) Primitive cell (B) Volume cell (C) Non primitive cell (D) Quantum dot
10. The number of Bravais lattices possible in nature
(A) 7 (B) 3 (C) 14 (D) Infinite
11. For a cubic crystal,
(A) a=b=c (B) a=b≠c (C) a≠b≠c (D) α=β=g≠ 900
12. Simple, base centered, body centered and face centered configuration possible for
(A) Orthorhombic (B) Rhombohedral (C) Triclinic (D) Monoclinic
13. Lattice planes are represented by
(A) Lattice parameters (B) Packing fraction (C) Miller indices (D) Interfacial angles
14. The miller indices of the plane parallel to y and z axes
(A) (100) (B) (001) (C) (010) (D) None of these
15. The miller indices of a plane with intercepts a, b/2, 3c in a simple cubic unit cell is
(A) (361) (B) (123) (C) (962) (D) (633)
16. The interplanar spacing dhkl is given by,
17. The interplanar spacing for (101) planes of a cubic crystal with lattice parameter 4 Å is
(A) 2.83Å (B) 5.68Å (C) 4Å (D) 2Å
18. The total number of atoms per unit cell in face centered cubic
(A) 4 (B) 6 (C) 8 (D) 12
19. Co-ordination number of body centered cubic lattice
(A) 6 (B) 8 (C) 12 (D) 2
20. Relation between atomic radius and the lattice constant in face centered cubic lattice
(A) a = 2R (B) a = (4/Ö3) R (C) a = 2Ö2 R (D) None of these
21. The interplanar spacing of (111) planes is 5Å for a fcc crystal. Its atomic radius is
(A)3.06Å (B) 3.86Å (C) 4.13Å (D) None of these
22. Expression for packing factor is
(A) n (4/3 pR3) / a3 (B) n (4/3 pa3) / R3 (C) (4/3 pR3) / a3 (D) n (4/3 pR3)
23. Packing fraction in simple cubic lattice is
(A) 1 (B) 0.52 (C)0.68 (D) 0.74
24. Which one of the following represents lattice parameter of a cubic crystal?
(A) (nM/rNA) (B) (nM/rNA)1/3 (C) (nM/rNA)3 (D) (n NA)/rM1/3
25. The lattice parameter of a cubic crystal is 3.57Å. If atomic weight is 12.01, density of the material is
(A) 3508 kg/m3 (B) 3508 g/cc (C) 4123 Kg/m3 (d) None of these
26. Which of the following is not crystallizing in fcc structure?
(A) Aluminium (B) NaCl (C) Diamond (D) Quartz
27. Lattice constant of NaCl crystal is
(A) (4/Ö3) R (B) 2Ö2 R (C) (8/Ö3) R (D) 2R
28. The number of molecules per unit cell in NaCl
(A) 1 (B) 2 (C) 4 (D) 8
29. The number of atoms per unit cell in Diamond
(A) 1 (B) 2 (C) 4 (D) 8
30. The coordination number of NaCl
(A) 4 (B) 6 (C) 8 (D) 12
31. The coordination number of diamond
(A) 4 (B) 6 (C) 8 (D) 12
32. Bragg’s law is given by
(A) 2d cosq = nl (B) 2d sinq = nl (C) d sinq = nl (D) 2lsinq = nd
33. When the crystal turns through q, ionization chamber of Bragg’s X-ray spectrometer turns through an angle
(A) q (B) 2q (C) q/2 (D) q2
34. X-rays of wavelength 0.58Å is incident on the plane (132) of NaCl which results in the 2nd order diffraction maxima taking the lattice spacing 3.81Å. Glancing angle in this case is
(A) 34.730 (B) 32.280 (C) 29.340 (D) None of these
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