Following is the unsaturated fatty acid:Select one:a. Stearic acidb. Butyric acidc. Acetic acidd. Oleic acid
Question
Solution
The answer is d. Oleic acid.
Here's why:
Unsaturated fatty acids have one or more double bonds between carbon atoms. Each double bond may be in a cis or trans isomer, depending on the geometry of the molecule.
a. Stearic acid is a saturated fatty acid with an 18-carbon chain and has the IUPAC name octadecanoic acid. It does not have a double bond, so it's not unsaturated.
b. Butyric acid is a saturated fatty acid with a 4-carbon chain. It also does not have a double bond, so it's not unsaturated.
c. Acetic acid is a short-chain fatty acid that consists of only two carbon atoms. It also does not have a double bond, so it's not unsaturated.
d. Oleic acid is an unsaturated fatty acid that contains one double bond. Its IUPAC name is cis-9-octadecenoic acid. This makes it the correct answer.
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