Oil is added to pickles to prevent microbes from growing. The oil layer stops air from reaching the food, creating a barrier that prevents microbial activity and keeps the pickles fresh for a long time.
Class 5 EVS Our Wondrous World Unit 2: Health and Well-being All Question Answer
Class 5 Our Wondrous World Chapter 3 The Mystery of Food NCERT solutions
Pickles are preserved by adding oil, which acts as a protective layer. This oil prevents air from reaching the food inside the jar, blocking one of the essential needs for microbial growth. Without air, microbes cannot survive or multiply, allowing the pickles to stay fresh, safe and tasty for several months, even without refrigeration, as long as the oil layer remains intact.
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