The components of liquid air on passing through a fractional distillation column separate based on:

melting point

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boiling point

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specific heat

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density

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Solution

The correct option is D boiling point
The components of liquid air on passing through a fractional distillation column separate based on boiling point. The component with a lower boiling point can be collected from the top of the fractionating column while the component with a higher boiling point is collected from the bottom of the column.

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Q. The liquid air has three components X, Y and Z whose boiling points are : – 186°C, –183°C and –196°C, respectively. When liquid air is fed into a tall fractional distillation column from near its bottom and warmed up slowly :

(a) Which component will be collected from near the bottom of the fraction distillation column ? Why ?
(b) Which component will be collected from the top part of the fractional distillation column ? Why ?
(c) Which component will be collected from the middle part of the fractional distillation column ? Why?
(d) What could the component X, Y and Z be ?

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