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- 1. Multiple Choice
The number of nearest particles which is in direct contact with a particle in a closed packed structure
Unit Cell
Void
Packing efficiency
Coordination number
- 2. Multiple Choice
Crystal system characterized by a ≠ b≠ c and α = β = γ = 90o
Hexagonal
Ortho rhombic
Tetragonal
Triclinic
- 3. Multiple Choice
Smallest repeating unit of crystal lattice
Lattice site
Unit cell
Crystal lattice
Lattice point
- 4. Multiple Choice
In a primitive unit cell atoms are present at the
Corners & Centers of any 2 opposite sides
Corners only
Corners and Body Centre
Corners & Centers of all faces
- 5. Multiple Choice
Based on the nature of intermolecular forces, classify the following solids : Silicon carbide
Ionic solid
Covalent solid
Molecular solid
Metallic solid
- 6. Multiple Choice
What type of material is this one?
Crystal
Amorphous
Covalent Crystal
Ionic Crystal
- 7. Multiple Choice
Which of the following is an amorphous solid?
Copper(Cu)
Quartz glass (SiO2)
Silicon carbide (SiC)
Sodium Chloride (NaCl)
- 8. Multiple Choice
The type of crystalline solid which is a good conductor in solid as well as molten state?
Ionic Solid
Metallic Solid
Covalent Solid
Molecular Solid
- 9. Multiple Choice
For orthorhombic system axial ratios are a b c and the axial angles are:
α = β = γ ≠ 90
α ≠ β ≠ γ ≠ 90
α = β = γ = 90
α ≠ β ≠ γ = 90
- 10. Multiple Choice
A collection of geometrical points in 3-d space arranged in a regular periodic manner is called ________
lattice
basis
unit cell
primitive cell
- 11. Multiple Choice
Which of the following is not correct?
Crystalline solids are anisotropic.
Lattice + Basis = Crystal
The various crystal planes are specified by a set of three numbers called Miller indices.
All Unit cells are Primitive cells.
- 12. Multiple Choice
The lattice site in a pure crystal cannot be occupied by ___________
molecule
atom
electron
ion
- 13. Multiple Choice
Which of the following is not a characteristic of a crystalline solid?
Definite and characteristic heat of fusion.
Long range order or perfect arrangement of constituent particles
Isotropic in nature
clean cleavage or smooth edges on cutting with a knife
- 14. Multiple Choice
Which of the following is a network solid or covalent crystalline solid?
Diamond (C)
H2O (Ice)
Calcium Fluoride (CaF2)
Iron Metal (Fe)
- 15. Multiple Choice
Crystalline solids are
Isotropic
Allotropic
Anisotropic
Isomorphic
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