Discussion
Consider the following statements about rancidity.
1. Oxidative rancidity arises from attack on the double bonds.
2. Hydrolytic rancidity releases free fatty acids and raises the acid value.
3. Refining a rancid oil restores it completely.
Answer: D
The first two are correct and name the two distinct mechanisms. The third overstates the case, since refining can remove the products of rancidity but cannot restore what has already been destroyed. Peroxide value tracks the first of the two.
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