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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 (B)</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 (C)</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.