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Q.

Which of the following gases can be used for storage of fresh sample of an oil for a long time

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a

Carbon dioxide or oxygen

b

Nitrogen or helium

c

Helium or oxygen

d

Nitrogen or oxygen

answer is B.

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Detailed Solution

To prevent rancidity we will use nitrogen gas (or) helium. Because these two gases do not mix with oils and they may facilitate an inert atmosphere.

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