Question

Why does edible oils shows rancidity when stored for long period?

Answer 1

When edible oil is stored for a long time it undergoes oxidation and become s rancid . Fats in the oil have carbon -carbon double bond in their structure .These bonds r broken by oxygen that's why edible oil becomes rancid.

Answer 2

Answer:

Edible oil develops rancidity when stored for a long period because of partial or complete oxidation and/or hydrolysis of oil.

Explanation:

• This takes place because of exposure of oil to moisture, air, light, enzymatic or microbial action.
• Due to this oxidation, primary and secondary oxidative products are formed which are not good for health.
• Natural anti-oxidants like vitamin-A in the oil help to prevent this oxidative processes.
• Rancidity not only reduces the shelf life of oils it also gives the oil an off-flavour with unpleasant taste and also reduces the nutritional value.