Saponification value/number of an oil or fat is a measure of its ___________________?
Correct answer: D. Average molecular weight
- A. Fatty acid content
- B. Degree of unsaturation of the fatty acids present in it
- C. Insoluble fatty acid content
- D. Average molecular weight
Explanation
The saponification number is the milligrams of KOH needed to saponify one gram of fat, so it is inversely related to the average molecular weight of its fatty acids. Smaller fatty-acid molecules require more KOH per gram and therefore give a higher value.
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