Creaming and Emulsions Quiz
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Questions and Answers

What is creaming in emulsions?

  • The separation of emulsion into two regions, one rich in the dispersed phase than the other (correct)
  • The process of breaking the emulsion into smaller droplets
  • The merging of emulsified particles to form large particles
  • The aggregation of dispersed particles without fusion

    • What is coalescence in emulsions?

  • The process by which emulsified particles merge to form large particles (correct)
  • The destruction of the film surrounding the particles
  • The separation of emulsion into two regions, one rich in the dispersed phase than the other
  • The aggregation of dispersed particles without fusion

    • How can creaming of emulsions be avoided?

  • Production of small droplet size emulsion by efficient emulsifying agent (correct)
  • Promoting the aggregation of dispersed particles
  • Reducing the viscosity of the continuous phase
  • Increasing the density difference between two phases

    • How can phase inversion in an emulsion be achieved?

    <p>By adding an electrolyte</p> Signup and view all the answers

    What is the major factor to prevent coalescence in emulsions?

    <p>The mechanical strength of the interfacial film</p> Signup and view all the answers

    How can upward and downward creaming in emulsions be classified?

    <p>According to the density of internal and external phase</p> Signup and view all the answers

    What is the purpose of adding α – tocopherol to emulsions?

    <p>To prevent oxidation of oils (antioxidant)</p> Signup and view all the answers

    Which type of emulsion is more stable in terms of microbial instability?

    <p>Water-in-oil (w/o) emulsion</p> Signup and view all the answers

    What is the effect of ionic surfactants on emulsions with opposite charged material?

    <p>Causes rapid creaming</p> Signup and view all the answers

    How can the stability activity of emulsions be assessed?

    <p>Globule size analysis</p> Signup and view all the answers

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