Order these (crude oil steps of separation via fractional distillation)

A So it is collected at a different point.
B The crude oil is heated and evaporates.
C Bitumen has a very high melting point and does not evaporate when the crude oil mixture is heated.
D As the gases move up the fractionating column they cool down.
E Each fraction condenses at a different temperature.
F The refinery gases have very low boiling points and do not condense and pass out of the top of the fractionating column.
G It is collected at the bottom of the fractionating column.
H The vapours move up the fractionating column.
I Each fraction contains hydrocarbons with a similar number of carbon atoms.
J The further up the column, the cooler it becomes.

1 is the answer to this problem

o conteúdo de calor de um sistema é igual à entalpia apenas para um sistema que é constante

colorless gas, exhibiting a blue glow when placed in an electric field

b) solid

its a type of rock

hydrocarbons are organic compounds that contain only hydrogens and carbons. they can be saturated (those which contain only carbon-carbon single bonds) or unsaturated (those which contain carbon-carbon double or triple bonds) in nature. hydrocarbons can undergo several reactions like substitution, elimination etc.  

on substituting one or more hydrogen atoms in hydrocarbon it results in the formation of haloalkane. as the halogen atoms are large compared to the carbon and hydrogen atoms, due to which the molecular weight increases and the bond become polar because of presence electronegative halogen atom and results in the increase in boiling point of the haloalkane.

thus, the correct option is (b) that is the boiling point of the new compound increases on substituting a hydrogen atom with a halogen in a hydrocarbon.