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 (C)</p> Signup and view all the answers

Which crystal habit shape is described as needle-like?

<p>Acicular (B)</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 (B)</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 (A)</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 (D)</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 (B)</p> Signup and view all the answers

How are crystals of a given substance bound together?

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

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

<p>Monoclinic unit cells (A)</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 (B)</p> Signup and view all the answers

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

<p>Cooling (C)</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. (C)</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 (B)</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 (D)</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 (C)</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 (B)</p> Signup and view all the answers

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