Pressure has the greatest effect on the solubility of

Explanation:

Henry's law states that the solutiblity of a gas in a liquid is propotional to the pressure that the gas exertes over the liquid.

Call Sg the solubility molar concentraion of tghe gas, mole concentration of the gas, Kh the constant of proportionality, and Pg the pressure of the gas, then:

Then, if the pressure increases the solubility of the gas (its concentration in the liquid) increases, and if the pressure decreases the solubility of the gas decreases.

The physical reason for the influence of the pressure on the solubility  is that more pressure forces the contact between the gas over the liquid and the liquid making that more gas gets into the liquid.

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.