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

(A) Carbon dioxide or oxygen

(B) Nitrogen or oxygen

(C) Carbon dioxide or helium

(D) Helium or nitrogen




Here, we can only use gases which do not react with the oil . So, we use inert gases


  • Helium and nitrogen are inert gases i.e. they are not reactive so fresh samples of oil can be stored in them.


So, the correct answer is (d)

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Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo