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NEETChemistryp Block Elements (Group 15, 16, 17 & 18)

How is dioxygen (O 2 ) obtained from air on a large scale in the industry?

Options

  1. ABy distillation
  2. BBy chemical reaction with carbon dioxide
  3. CBy combustion
  4. DBy liquefaction and fractional distillation

Correct answer

D. By liquefaction and fractional distillation

Step-by-step solution

The paragraph explains that industrially, dioxygen is obtained from air by first removing carbon dioxide and water vapor and then liquefying and fractionally distilling the remaining gases to obtain dinitrogen and dioxygen.

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