Solid States
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Questions and Answers

What is the coordination number of Zn²⁺ ion in Zinc blende (ZnS) type crystal structure?

  • 6
  • 4 (correct)
  • 8
  • 12

    • What is the arrangement of Cl⁻ ions in Rock salt (NaCl) type crystal structure?

  • bcc
  • fcc with Cl⁻ ions occupying the corners and face centres of a cube (correct)
  • hcp
  • fcc

    • What is the coordination number of Ca²⁺ ion in Fluorite (CaF₂) type crystal structure?

  • 4
  • 8 (correct)
  • 6
  • 12

    • What is the arrangement of Cs⁺ ions in Antifluorite type crystal structure?

    <p>bcc with Cs⁺ at the body centre and Cl⁻ ions at the corners of a cube</p> Signup and view all the answers

    What is the arrangement of S²⁻ ions in Zinc blende (ZnS) type crystal structure?

    <p>ccp</p> Signup and view all the answers

    What is the characteristic arrangement of atoms in a face-centred cubic (fcc) unit cell?

    <p>Atoms are arranged at the corners and at the centre of each face of the unit cell.</p> Signup and view all the answers

    What is the effect of slow cooling on the crystal size?

    <p>Crystals of large size are obtained.</p> Signup and view all the answers

    What is the significance of negative signs in Miller indices?

    <p>It is indicated by placing a bar on the intercept.</p> Signup and view all the answers

    What is the characteristic of all parallel planes in a crystal?

    <p>They have the same Miller indices.</p> Signup and view all the answers

    What is the process by which crystals of a substance are obtained?

    <p>Cooling the liquid or the melt of the solution of the substance.</p> Signup and view all the answers

    What is the total number of possible Bravais Lattices that can be arranged?

    <p>14</p> Signup and view all the answers

    What is the characteristic of a crystal system that has a lattice point at the eight corners of the unit cell and at the body centered?

    <p>Body Centered Tetragonal</p> Signup and view all the answers

    What is the term for a regular array of points in three dimensions that represents an atom or a group of atoms?

    <p>Space Lattice</p> Signup and view all the answers

    Which of the following crystal systems has a lattice point at the eight corners of the unit cell and at the six face centers?

    <p>Face Centered</p> Signup and view all the answers

    What is the term for a homogeneous portion of a crystalline substance composed of a regular pattern of structural units?

    <p>Crystal</p> Signup and view all the answers

    What is a characteristic of anisotropic substances?

    <p>They show different properties in different directions</p> Signup and view all the answers

    What is a characteristic of SiO4 tetrahedra in amorphous solids?

    <p>They are randomly joined, giving rise to polymeric chains or sheets</p> Signup and view all the answers

    What is a physical property of diamond?

    <p>It is transparent and has a high refractive index</p> Signup and view all the answers

    What is a characteristic of graphite?

    <p>It is a good conductor of heat and electricity</p> Signup and view all the answers

    What is a difference between diamond and graphite?

    <p>Diamond has a higher relative density than graphite</p> Signup and view all the answers

    What is the characteristic of crystalline solids with ionic bonding?

    <p>Hard but brittle nature</p> Signup and view all the answers

    Which property of diamond makes it an insulator?

    <p>Electron sharing between atoms</p> Signup and view all the answers

    What is the characteristic of graphite, an allotrope of carbon?

    <p>High electrical conductivity</p> Signup and view all the answers

    Which type of bonding is present in crystalline solids like SiO2 (quartz)?

    <p>Electron sharing</p> Signup and view all the answers

    What is the main difference between crystalline and amorphous silica (SiO2)?

    <p>Their crystal structure</p> Signup and view all the answers

    What is the maximum number of possible space lattices that can be arranged?

    <p>14</p> Signup and view all the answers

    What is the characteristic of a crystal system that has a lattice point at the eight corners and at the body center?

    <p>Body-centered cubic</p> Signup and view all the answers

    What is the number of different crystal systems that can exist?

    <p>7</p> Signup and view all the answers

    What is the term for a regular array of points in three dimensions that represents an atom or a group of atoms?

    <p>Space lattice</p> Signup and view all the answers

    What is the characteristic of a crystal that has a regular pattern of structural units (ions, atoms, or molecules)?

    <p>Homogeneous</p> Signup and view all the answers

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