Engineering Thermodynamics
Which of the following can be regarded as gas so that gas laws could be applicable, within the commonly encountered temperature limits?

SO₂, NH₃, CO₂, moisture
O₂, N₂, H₂, air
O₂, N₂, water vapour
O₂, N₂, steam, CO₂

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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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