Question

Which technique would you employ to separate oxygen from air?

Answer 1

• Fractional distillation is a technique used to separate different gases in the air.
• To separate oxygen we can employ this method by warming liquid air (air that liquified under pressure) and allowing it to rise in the fractionating column.
• The gases present is separated according to the boiling point.
• Oxygen having the boiling point $-{183}^{\mathrm{o}}\mathrm{c}$ will also be separated.
• Nitrogen having boiling point $-{196}^{\mathrm{o}}\mathrm{c}$ and argon having boiling point $-{186}^{\mathrm{o}}\mathrm{c}$ can also be separated from the air.