Question:
Ketonic rancidity is caused due to:
Ketonic rancidity is caused due to:
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Ketonic rancidity is particularly common in coconut and palm kernel oils due to their high content of short and medium-chain saturated fatty acids.
Updated On: Jul 4, 2026
- Algae
- Fungi
- Protozoa
- Bacteria
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The Correct Option is B
Solution and Explanation
Concept:
Rancidity is the process of oxidation or hydrolysis of fats and oils which leads to unpleasant odors.
• Oxidative rancidity: Caused by oxygen exposure.
• Hydrolytic rancidity: Caused by moisture and enzymes.
• Ketonic rancidity: Specifically caused by microbial action on short-chain fatty acids.
Step 1: Understanding the microbial role.
Ketonic rancidity occurs when certain microorganisms act on saturated fatty acids. These microbes are predominantly molds, which belong to the Fungi kingdom.
Step 2: The chemical process.
Fungi like Aspergillus niger and Penicillium species perform $\beta$-oxidation. This process converts fatty acids into odorous ketones.
Step 3: Final Identification.
Since molds (fungi) are the primary causative agents: Final Answer: (B)
• Oxidative rancidity: Caused by oxygen exposure.
• Hydrolytic rancidity: Caused by moisture and enzymes.
• Ketonic rancidity: Specifically caused by microbial action on short-chain fatty acids.
Step 1: Understanding the microbial role.
Ketonic rancidity occurs when certain microorganisms act on saturated fatty acids. These microbes are predominantly molds, which belong to the Fungi kingdom.
Step 2: The chemical process.
Fungi like Aspergillus niger and Penicillium species perform $\beta$-oxidation. This process converts fatty acids into odorous ketones.
Step 3: Final Identification.
Since molds (fungi) are the primary causative agents: Final Answer: (B)
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