Wheat and Rice Starch Properties
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Questions and Answers

What is wheat starch obtained from?

Grains of Triticum vulgare

Wheat starch is characterized by its __________ condition.

powder

Which of the following describes the appearance of rice starch?

  • Large size
  • Polyhedral shape (correct)
  • Absent hilum (correct)
  • Rounded or lenticular shape

    • Wheat starch is soluble in water.

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

    Match the starch types with their corresponding characteristics:

    <p>Wheat Starch = Rounded or Lenticular shape, Blue colour with iodine Rice Starch = Polyhedral shape, Absent hilum Potato Starch = Characteristics not specified Maize Starch = Characteristics not specified</p> Signup and view all the answers

    What is the effect of H2SO4 on wheat starch?

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

    How does rice starch respond to iodine?

    <p>Blue colour</p> Signup and view all the answers

    What is wheat starch?

    <p>It is polysaccharide granules obtained from the grains of Triticum vulgare.</p> Signup and view all the answers

    What are the physical characteristics of wheat starch?

    <p>Odour: Odourless</p> Signup and view all the answers

    Wheat starch is soluble in water.

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

    What is the shape of wheat starch granules?

    <p>Rounded or lenticular.</p> Signup and view all the answers

    Rice starch is obtained from ______.

    <p>Oriza sativa</p> Signup and view all the answers

    What is a physical characteristic of rice starch?

    <p>Odour: Odourless</p> Signup and view all the answers

    The hilum of rice starch is always visible.

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

    What effect does iodine have on starch?

    <p>Blue colour</p> Signup and view all the answers

    What happens to starch when hot water is applied?

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

    Study Notes

    Wheat Starch

    • Origin: Polysaccharide granules sourced from triticum vulgare f: gramineae (wheat) grains.
    • Physical Characters:
      • Condition: Powder
      • Color: White
      • Taste: Starchy
      • Odor: Odorless
      • Solubility: Insoluble in water
      • Homogeneity: Homogenous
      • Touch: Smooth
    • Microscopical Characters:
      • Shape: Rounded or lenticular
      • Size: Medium
      • Hilum: Present (faint), centric point
      • Striations: Present (distinct), concentric
      • Aggregation: Mainly simple
    • Chemical Characters:
      • Effects of Iodine: Blue color
      • Effects of H2SO4: Charring
      • Effects of hot H2O: Gelatinization forming a gel-like substance upon cooling

    Rice Starch

    • Origin: Polysaccharide granules made from oryza sativa f:-gramineae (rice) grains.
    • Physical Characters:
      • Condition: Powder
      • Color: White
      • Taste: Starchy
      • Odor: Odorless
      • Solubility: Insoluble in water
      • Homogeneity: Homogenous
      • Touch: Gritty
    • Microscopical Characters:
      • Shape: Polyhedral
      • Size: Small
      • Hilum: Invisible or absent
      • Striations: Invisible or absent
      • Aggregation: Mainly compound (containing more than 2 granules without a common sheath)
    • Chemical Characters:
      • Effects of Iodine: Blue color
      • Effects of H2SO4: Charring
      • Effects of hot H2O: Gelatinization forming a gel-like substance upon cooling

    Wheat Starch

    • Origin: Polysaccharide granules extracted from wheat grains (Triticum vulgare, family Gramineae)
    • Physical Characteristics:
    • Condition: Powder
    • Color: White
    • Taste: Starchy
    • Odor: Odorless
    • Solubility: Insoluble in water
    • Homogeneity: Homogenous
    • Touch: Smooth

    Wheat Starch - Microscopical Characteristics

    • Shape: Rounded or lenticular
    • Size: Medium
    • Hilum: Present (faint), centric point
    • Striations: Present (distinct), concentric
    • Aggregation: Mainly simple

    Wheat Starch - Chemical Characteristics

    • Effects of Iodine: Blue color
    • Effects of H2SO4: Charring
    • Effects of Hot Water: Gelatinization, forming a gel-like consistency upon cooling

    Rice Starch

    • Origin: Polysaccharide granules made from rice grains (Oryza sativa, family Gramineae)
    • Physical Characteristics:
    • Condition: Powder
    • Color: White
    • Taste: Starchy
    • Odor: Odorless
    • Solubility: Insoluble in water
    • Homogeneity: Homogenous
    • Touch: Gritty

    Rice Starch - Microscopical Characteristics

    • Shape: Polyhedral
    • Size: Small
    • Hilum: Invisible or absent
    • Striations: Invisible or absent
    • Aggregation: Mainly compound (containing more than two granules without a common sheath)

    Rice Starch - Chemical Characteristics

    • Effects of Iodine: Blue color
    • Effects of H2SO4: Charring
    • Effects of Hot Water: Gelatinization, forming a gel-like consistency upon cooling

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    Related Documents

    Wheat and Rice Starch PDF

    Description

    Explore the physical, microscopical, and chemical characteristics of wheat and rice starch. This quiz covers the origins, physical traits, and specific reactions of starch samples from these grains. Test your knowledge on their properties and differences.

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