3
Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A) : Lipid-rich foods, exposed too long to the air become rancid
Reason (R) : The double bonds in the unsaturated fatty acid in lipids undergo oxidative cleavage to produce compounds of
higher volatility.
In light of the above statements, choose the correct answer from the options given below.
EXPLANATION
Carbohydrates & Lipids
- Assertion (A) is True: Lipid-dense foodstuffs containing unsaturated triacylglycerols develop an offensive odor and rancid taste (oxidative rancidity) upon extended air exposure.
- Reason (R) is True & Explains (A): Atmospheric molecular oxygen initiates free-radical lipid peroxidation at allylic methylene carbons of unsaturated fatty acid double bonds, forming unstable lipid hydroperoxides that cleave into pungent, volatile short-chain aldehydes, ketones, and carboxylic acids (e.g., malondialdehyde, hexanal).
- Conclusion: Both (A) and (R) are true and (R) is the correct explanation of (A).
Correct option: (1) Both (A) and (R) are true and (R) is the correct explanation of (A)
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