Which of the following method is to be applied to separate oxygen rich components and nitrogen rich components?

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ACrystallization

BEvaporation

CMagnetic separation

DDistillation

Answer:

Distillation (Fractional Distillation): Atmospheric air is a homogeneous mixture of gases like nitrogen, oxygen, and argon.
To separate oxygen-rich and nitrogen-rich components, the air is first liquefied under high pressure and low temperature.
The liquid air is then slowly warmed up in a fractional distillation column, allowing the components to separate based on their different boiling points.
Crystallisation is used to separate solid crystals from a solution.
Evaporation is used to separate a dissolved solid from a liquid solvent.
Magnetic separation is used to separate magnetic materials from non-magnetic ones.

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