it is recommended to use airtight container for storing oil for long time.
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19
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Answer. Yes, oxygen (and sunlight) can affect the quality of oil. The oil turns rancid after some time. And storing the oil in a really airtight container (like a can from which air has been evacuated before sealing) should prevent or at least slow the process.
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15
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when the cooking oil has been kept in the contact of air oxygen for a long duration of time it gets oxidized and her was foul odour and its taste also changes this process is called rancidity so show the oil is been kept in the air tight containers to prevent rancidity of oil
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