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प्रश्न
Give reason for the following.
Raw vegetables and fruits are kept in refrigerators, whereas jams and pickles can be kept outside.
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उत्तर
Raw vegetables and fruits get easily infected by microorganisms and get spoiled. They are kept in refrigerator at low temperature that inhibits growth of microbes. Jams and pickles contain sugar and salt as preservatives.
These preservatives form a protective layer and prevent spoilage of these products by inhibiting the growth of various microorganisms.
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