
Concept explainers
Indicate whether each of the following general statements about lipids is true or false.
- a. Lipids are compounds soluble in both polar and nonpolar solvents.
- b. Saponifiable lipid molecules are easily converted into two or more simpler molecules.
(a)

Interpretation: The validation of the given general statement about lipid has to be predicted.
Concept introduction: Lipids are the organic compounds which are fatty acids or the derivatives of fatty acids. They are insoluble in water but are soluble in non-polar organic solvents. They include natural oils, waxes and steroids.
Answer to Problem 19.1EP
The given statement about lipids is false.
Explanation of Solution
Lipids are the substances that are not soluble or partially soluble in polar solvents, like water. When tissues of plants, animals, human are homogenized and put in non-polar solvents, only lipids are soluble. Hence, the given statement is false.
(b)

Interpretation: The validation of the given general statement about lipid has to be predicted.
Concept introduction: Lipids are the organic compounds, which are fatty acids or the derivatives of fatty acids. They are insoluble in water but are soluble in non-polar organic solvents. They include natural oils, waxes and steroids.
Answer to Problem 19.1EP
The given statement about lipids is true.
Explanation of Solution
One of the method used for classifying lipids is, wether the hydrolysis of lipids in basic solution takes place or not. If the hydrolysis of lipids takes place, it is called saponification. The lipids that undergo hydrolysis are called saponifiable lipids. Hence, the given statement is true.
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Chapter 19 Solutions
General, Organic, and Biological Chemistry
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