Crystalline Forms and Products of Crystallization Quiz
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Questions and Answers

Which factor does NOT influence the crystal habit of a substance during crystallization?

  • Pressure applied (correct)
  • Presence of impurities
  • Solvent used
  • Temperature
  • Which physical property of crystals can significantly affect the production of dosage forms?

  • Crystal sound
  • Crystal shape (correct)
  • Crystal color
  • Crystal taste
  • What term is used to describe a unit cell with a single atom in the centre?

  • End-centred
  • Central-centred
  • Face-centred
  • Body-centred (correct)
  • Under what conditions does Ibuprofen typically produce crystals with better flow properties?

    <p>Crystallization from methanol</p> Signup and view all the answers

    Which crystal habit shape is described as needle-like?

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

    What term is used to describe crystals with a single atom at the center of the top or bottom faces?

    <p>End-centred</p> Signup and view all the answers

    What defines a unit cell in a crystal lattice?

    <p>The arrangement of molecules or ions within it</p> Signup and view all the answers

    In a centered unit cell, where are constituent particles present?

    <p>At positions other than corners in addition to corners</p> Signup and view all the answers

    What type of unit cell do crystals have when their constituent particles are only at the corner positions?

    <p>Primitive unit cells</p> Signup and view all the answers

    How are crystals of a given substance bound together?

    <p>By plane surfaces called faces</p> Signup and view all the answers

    What type of unit cell structure do drug molecules typically form?

    <p>Monoclinic unit cells</p> Signup and view all the answers

    What influences the crystal habits of a substance?

    <p>The size of the molecules or ions in the lattice</p> Signup and view all the answers

    Which process is mostly used to achieve supersaturation of solute in a solution during crystallization?

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

    What is the difference between an amorphous solid and a crystalline solid?

    <p>Crystalline solids have a highly ordered array of constituents, while amorphous solids do not.</p> Signup and view all the answers

    What is the primary factor influencing the formation of crystalline solids when most liquids are cooled?

    <p>Temperature drop</p> Signup and view all the answers

    What are the constituents that make up a crystal or crystalline solid?

    <p>Highly ordered array of constituents forming a three-dimensional network</p> Signup and view all the answers

    How is crystal growth achieved during the crystallization process?

    <p>By transferring solute from the solution to the crystal state through a dissolution process</p> Signup and view all the answers

    What term describes the collection of lattice points that form the three-dimensional arrangement in a crystal lattice?

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

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