Crystalline and Amorphous Solids
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Questions and Answers

Which factor does not influence polymorphism?

  • Pressure
  • Solvents
  • Humidity (correct)
  • Temperature
  • What is the key characteristic of enantiotropic polymorphs?

  • Affected by temperature and moisture (correct)
  • Reversible change
  • Not affected by grinding
  • Irreversible change
  • Which type of polymorph undergoes an irreversible change?

  • Monotropic (correct)
  • Stable
  • Metastable
  • Enantiotropic
  • What can cause crystal growth in creams due to phase transformation?

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

    Which factor is critical in causing eventual caking in suspensions?

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

    What effect can surfactants have on crystal growth?

    <p>Accelerate crystal growth</p> Signup and view all the answers

    Which type of polymorph is not affected by temperature and moisture?

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

    In which form may some polymorphs be difficult to inject or formulate as tablets?

    <p>'Metastable' form</p> Signup and view all the answers

    Which factor influences crystal growth by adsorbing onto the growing faces?

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

    What type of polymorph undergoes irreversible change and is unaffected by temperature, moisture, and grinding?

    <p>Monotropic Stable</p> Signup and view all the answers

    Which type of polymorph undergoes reversible changes affected by temperature, moisture, and grinding?

    <p>Enantiotropic Stable</p> Signup and view all the answers

    Which factor does NOT influence polymorphism?

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

    What pharmaceutical implication does polymorphism have regarding cream formulations?

    <p>Resulting in gritty creams due to phase transformation</p> Signup and view all the answers

    Which stable polymorph is affected by temperature, moisture, and grinding?

    <p>Enantiotropic Stable</p> Signup and view all the answers

    Which type of polymorph undergoes irreversible change and is affected by temperature, moisture, and grinding?

    <p>Monotropic Metastable</p> Signup and view all the answers

    Which factor plays a critical role in causing eventual caking in suspensions?

    <p>Rate of Crystallization</p> Signup and view all the answers

    Which factor is listed as influencing polymorphism?

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

    What type of polymorph undergoes irreversible change and is not influenced by temperature, moisture, or grinding?

    <p>Enantiotropic Metastable</p> Signup and view all the answers

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