Question

What is rancidity give any two methods in slow down?

Answer 1

When edible items left open in damp air for a considerable period of time they becomes rancid and this process is known as rancidity .
Methods to slow down :
By adding antioxidants like Nitrogen , BHT , BHA etc .
By storing it in air tight containers .
By keeping it away from the effect of sunlight .
By storing it in the refrigerator .
By packing it in vaccum containers .
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Answer 2

1)Galvanisation 2)painting 3)oiling 4)greasiing  Hope it helps!