Question

Separation of liquid $N_2$ from liquid $O_2$ is done by fractional ________:

• A. distillation
• B. crystallization
• C. chromatography
• D. filtration

Answer 1

Answer: (A)

distillation

Fractional distillation is the separation of a mixture into its component parts or fractions such as in separating chemical compounds by their boiling point by heating them to a temperature at which one or more fractions of the compound will vaporize. It is used in air separation producing liquid oxygen and liquid nitrogen.