Fats and Oils Quiz
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Questions and Answers

What is the chemical unit commonly called 'triglycerides' composed of?

  • One unit of glycerol and three units of fatty acids (correct)
  • Two units of glycerol and two units of fatty acids
  • Four units of glycerol and one unit of fatty acid
  • Three units of glycerol and one unit of fatty acid
  • In which solvents are triglycerides soluble?

  • Hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid
  • Methanol, chloroform, ammonia, isopropyl alcohol
  • Petroleum ether, benzene, hexane, carbon tetra chloride, ethyl alcohol (correct)
  • Water, acetone, vinegar, hydrogen peroxide
  • How are triglycerides classified based on their state at room temperature?

  • Liquid as fats, and solid or semi solid as oils
  • Solid or semi solid as fats, and liquid as oils (correct)
  • Solid as oils, and liquid or semi solid as fats
  • Liquid or semi solid as fats, and solid as oils
  • Where do triglycerides that are classified as oils originate chiefly from?

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

    What do fats and oils supply more than twice the energy as compared to?

    <p>Proteins and carbohydrates</p> Signup and view all the answers

    Study Notes

    Composition of Triglycerides

    • Composed of three fatty acid molecules esterified to a glycerol backbone.
    • Fatty acids can be saturated or unsaturated, influencing physical properties.

    Solubility of Triglycerides

    • Soluble in organic solvents such as chloroform, ether, and benzene.
    • Insoluble in water due to their nonpolar nature.

    Classification of Triglycerides

    • Classified as solid fats or liquid oils based on their state at room temperature.
    • Solid fats contain higher levels of saturated fatty acids, while liquid oils have more unsaturated fatty acids.

    Origin of Oils

    • Oils primarily originate from plant sources, such as seeds, nuts, and fruits.
    • Common examples include olive oil, sunflower oil, and peanut oil.

    Energy Density of Fats and Oils

    • Fats and oils supply more than twice the energy compared to carbohydrates and proteins.
    • They provide approximately 9 calories per gram, while carbohydrates and proteins provide about 4 calories per gram.

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    Description

    Test your knowledge about the chemical composition and characteristics of fats and oils, including their solubility properties. Explore the major food groups and their classification as fats or oils.

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