Which of the following technique can be used for separation of components of air?

Filteration

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Evaporation

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Crystallisation

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Fractional distillation

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Solution

The correct option is D Fractional distillation
The air is compressed by increasing the pressure and is then cooled by decreasing the temperature to get liquid air. This liquid air is allowed to warm-up slowly in a fractional distillation column, where gases get separated at different heights depending upon their boiling points

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