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Various gases present in air are oxygen, nitrogen, argon and neon. The boiling points of these gases are –183, –196, –186 and –246 degrees Celsius, respectively. These gases are separated from each other by the process of fractional distillation. Which of the following statements about the order in which these gases get separated is correct?

Various gases present in air are oxygen, nitrogen, argon and neon. The boiling points of these gases are –183, –196, –186 and –246 degrees Celsius, respectively. These gases are separated from each other by the process of fractional distillation. Which of the following statements about the order in which these gases get separated is correct? Correct Answer Oxygen will liquefy first and neon in the end.

The correct answer is Oxygen will liquefy first and neon in the end.

Concept:

Fractional distillation:

  • It is a process by which components in a chemical mixture are separated into different parts (called fractions) according to their boiling points.
  • It is used to purify chemicals and separate mixtures to obtain their components.

Explanation:

Separation of gases by Fractional distillation:

  • Each gas has a characteristic boiling point, defined as the temperature at which it transforms from a liquid into a gas.
  • If we have a random sample of gases, we can separate them by gradually cooling the sample until each component gas liquifies.
  • The gas with a lower boiling point will liquify first and the one with the highest boiling point in the end. 

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Oxygen will liquefy first and neon in the end.

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