Which of the following gases can be used for storage of fresh sample of an oil for a long time?
(a) CO2 or O2 (b) N2 or O2 (c) CO2 or He (d) He or N2
Which of the following gases can be used for storage of fresh sample of an oil for a long time?
(a) CO2 or O2 (b) N2 or O2 (c) CO2 or He (d) He or N2