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Process of Obtaining Different Gases from Air

Which of the ...

Question

Which of the following gas is collected at the top in fractional distillation?

A

Oxygen

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B

Argon

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C

Nitrogen

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D

Hydrogen

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Solution

The correct option is C Nitrogen
The 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. Liquid nitrogen having the boiling point of $196^{o} C$ boils to form liquid nitrogen gas and is collected from the upper part of the column.

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Process of Obtaining Different Gases from Air

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