Which of the following gases can be used for storage of fresh sample 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.
Answer:D
Which of the following gases can be used for storage of fresh sample 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.