Engineering Thermodynamics
The distillation carried out in such a way that the liquid with the lowest boiling point is first evaporated and re-condensed, then the liquid with the next higher boiling point is then evaporated and re-condensed, and so on until all the available liquid fuels are separately recovered in the sequence of their boiling points. Such a process is called

Fractional distillation
Cracking
Full distillation
Carbonisation

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Engineering Thermodynamics
Gases have

Only one value of specific heat
Two values of specific heat
Under some conditions one value and sometimes two values of specific heat
No value of specific heat

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