Propane is a fuel that is sold in rigid, pressurized cylinders. most of the propane in a cylinder is liquid with gas in the space about the liquid level.

once fuel is discharged from the cylinder, the fuel leaves the cylinder as a gas.

Explanation:

Propane may be a fuel that's sold in rigid, pressurized cylinders. Most of the fuel in an exceedingly cylinder is liquid, with gas within the area on top of the liquid level. once fuel is discharged from the cylinder, the fuel leaves the cylinder as a gas. fuel gas is employed as a fuel by compounding it with element within the air and igniting the mixture, as depicted by the balanced equation below,

+ 502(g) n, 3C02(g) + 4H20(l) + two,219.2 kJ

A small quantity of methane thiol, that incorporates a distinct odor, is supplementary to the fuel to assist customers discover a propane leak, In methane thiol, the odor is caused by the thiol practical cluster (#SI-I). Methane thiol, CH3SH, incorporates a structure that's terribly like the structure of alcohol. Based on the data given, draw a molecular formula within the box provided for a molecule of methane thiol.

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.