For the chemical elements: hydrogen with 20, 28 K.
Oxygen has the lowest boiling point of these. It is far below the boiling points of the others.
Gasoline is the petroleum refinery product has lowest boiling point.
Helium has the lowest boiling point of any known substance, at -268.9 degrees Celsius.
The alkane with the lowest boiling point among all alkanes is methane.
Mercury Hg -38.8' Now you could consider Hydrogen to be a metal if you are willing to get creative with the definition of metal. In that case it would be −259.16 °C
Helium melting point: -272,2 0C Rhenium boiling point: 5 596 0C
Pentene
Helium has the lowest boiling point of not just the noble gasses, but of any known substance.
C2H2 (acetylene) has the lowest boiling point among the molecules listed. This is because it is a small, nonpolar molecule with weak intermolecular forces, which results in low boiling point.
The liquid with the lowest boiling point will be the first to be collected in fractional distillation. This is because it vaporizes at a lower temperature and rises first in the fractionating column before condensing.
The fraction of crude oil that has the lowest boiling point is the Liquified Petroleum Gas, which is a mixture of small hydrocarbons(methane, ethane, etc).
cyclobutane