What Do You Know About Microencapsulation? Quiz

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What Do You Know About Microencapsulation? Quiz - Quiz

Here is a fantastic "What Do You Know About Microencapsulation?" quiz for you. Primarily in biology and food studies, microencapsulation (or micro-encapsulation) is a procedure in which little particles or droplets are encompassed by a covering or coating to give little cases of numerous valuable properties.
On a micrometric balance, microencapsulation is basically used for joining food ingredients, cells, proteins, enzymes, and/or different materials. Best of luck with this test!


Questions and Answers
  • 1. 

    Which of the following is a small spherical particle with the size varying between 50nm to 2mm, which contains a core substance?

    • A.

      Vacuole

    • B.

      Microcapsule

    • C.

      Droplet

    • D.

      Shell

    Correct Answer
    B. Microcapsule
    Explanation
    A microcapsule is a small spherical particle that contains a core substance. It has a size that can vary between 50nm to 2mm. Unlike vacuoles, which are membrane-bound organelles found in cells, microcapsules are synthetic particles. Droplets and shells are also not the correct answers as they do not specifically refer to small spherical particles with a core substance.

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  • 2. 

    Which of the following does the technique of microencapsulation depend on?

    • A.

      Melting Point of the Material

    • B.

      Relativity of the Material

    • C.

      Chemical Properties of the Material

    • D.

      Sensitivity of the Material

    Correct Answer
    C. Chemical Properties of the Material
    Explanation
    Microencapsulation is a technique that involves enclosing small particles or droplets of a material within a protective coating. The success of this technique depends on the chemical properties of the material being encapsulated. These properties determine the compatibility of the material with the coating material and the ability of the coating to effectively encapsulate and protect the material. Factors such as solubility, reactivity, and stability of the material play a crucial role in determining the suitability of the material for microencapsulation.

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  • 3. 

    Which of the following is not a component of a microcapsule?

    • A.

      External Phase

    • B.

      Core

    • C.

      Fill

    • D.

      Membrane

    Correct Answer
    A. External Phase
    Explanation
    A microcapsule is a tiny spherical particle that consists of a core material surrounded by a membrane. The core contains the active ingredient or payload, while the membrane acts as a protective barrier. The external phase refers to the surrounding medium in which the microcapsule is dispersed, such as a liquid or solid matrix. Therefore, the external phase is not a component of the microcapsule itself, but rather the environment in which it exists.

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  • 4. 

    Which of the following is used as a coating material in microencapsulation?

    • A.

      Methyl Cellulose

    • B.

      Potassium alginate

    • C.

      Rhodoviol

    • D.

      Ethanol

    Correct Answer
    C. Rhodoviol
    Explanation
    Rhodoviol is used as a coating material in microencapsulation.

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  • 5. 

    Which of these is odd regarding the methods used in manufacturing microcapsules? 

    • A.

      Physical Method

    • B.

      Chemical Methods

    • C.

      Coarcervation-Phase Separation

    • D.

      Physicochemical Methods

    Correct Answer
    C. Coarcervation-Phase Separation
    Explanation
    Coarcervation-Phase Separation is odd regarding the methods used in manufacturing microcapsules because it is a specific technique used to encapsulate materials by inducing phase separation in a polymer solution. This method involves the formation of a coacervate phase, which is a liquid droplet rich in the encapsulated material, followed by solidification to form microcapsules. In contrast, the other options - Physical Method, Chemical Methods, and Physicochemical Methods - are broader categories that encompass various techniques used in microcapsule manufacturing.

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  • 6. 

    Which of these is not a step involved in Coacervation-phase separation technique?

    • A.

      Coat Rigidization

    • B.

      Coat Deposition

    • C.

      Evaporation of the solvent from the matrix material

    • D.

      Formation of three immiscible chemical phases

    Correct Answer
    C. Evaporation of the solvent from the matrix material
    Explanation
    Coacervation-phase separation technique involves the formation of three immiscible chemical phases, coat deposition, and coat rigidization. However, evaporation of the solvent from the matrix material is not a step involved in this technique.

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  • 7. 

    Which of these is not a way by which surrounding walls of microcapsules are broken?

    • A.

      Increasing the temperature to melt the wall

    • B.

      Wall dissolution

    • C.

      Using fast disintegration

    • D.

      Applying shear stress on the wall

    Correct Answer
    C. Using fast disintegration
  • 8. 

    Which of the following is not an application of microencapsulation?

    • A.

      Visual Indicators

    • B.

      DNA Protection

    • C.

      Carbonless copy paper

    • D.

      Carbonated soft drinks

    • E.

      Essential oils

    Correct Answer
    D. Carbonated soft drinks
  • 9. 

    Which of the following is not involved in the physical method of microencapsulation?

    • A.

      Ionotropic gelation

    • B.

      Spray-drying

    • C.

      Vibrational nozzle

    • D.

      Centrifugal extrusion

    Correct Answer
    A. Ionotropic gelation
    Explanation
    Ionotropic gelation is a chemical method of microencapsulation, not a physical method. In ionotropic gelation, the encapsulating material is crosslinked by the addition of a crosslinking agent, which is a chemical process. On the other hand, spray-drying, vibrational nozzle, and centrifugal extrusion are all physical methods of microencapsulation, where the encapsulating material is physically transformed into microspheres or particles using techniques such as drying, vibration, or centrifugal force.

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  • 10. 

    When did Barrett K. Green receive the patent for the process of microencapsulation?

    • A.

      July 5, 1945

    • B.

      July 5, 1950

    • C.

      July 5, 1955

    • D.

      July 5, 1960

    Correct Answer
    C. July 5, 1955
    Explanation
    Barrett K. Green received the patent for the process of microencapsulation on July 5, 1955.

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  • Current Version
  • Jan 24, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • May 25, 2018
    Quiz Created by
    AdeKoju
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