Multiple choice Spoilage of oil can be detected by which fatty acid? Linoleic acid Erucic acid Oleic acid Linolenic acid Reveal answer Fill a bubble to check yourself B Correct answer Explanation Erucic acid (C22H42O2) is a monoethenoid acid, that is the cis isomer of brassidic acid and makes up about 40-50% of the total fatty acid; crystalizes as needles from alcohol solution. It is soluble in ethanol and methanol.