Which of following is mendeleev not credited with? select one: a. organizing the elements by increasing atomic weight. b. organizing the elements into groups that share chemical and physical properties. c. organizing the elements based on the location of electrons in the atom. d. creating a table with vertical, horizontal and diagonal patterns and relationships.

56 moles of   lieter in chemistry

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.