Question

please answer the attached question of class 10 science​

Answer 1

Answer:

option 1..

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Answer 2

Answer:

Hi mate here is your answer....

Nitrogen... or Helium option 4.....

Helium, as well as nitrogen, can be used for storage of a fresh sample of an oil for a long time because they abstain the oil from rancidity. The contact of air and oil is prevented by using nitrogen or helium as blanketing gas.

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