When dry hydrogen halide, HX, is dissolved in an alcohol, ROH, the resulting conducts an electric current. Upon heating, an alkyl halide RX is formed. Additional sulfuric acid speeds up the formation of RX. Except for most primary alcohols , rearrangements of the same pattern as in Sec 5.22 of Organic CChemistry, Morrison and Boyd takes place. The order of reactivity of alcohols toward HX is 3o>2o>1o<CH3. i) Propose a likely mechanism for this reaction, showing how all the facts are accounted for.

ii) The alcohol, ClCH2CHOHCH3, although formally secondary reacts slowly , and at about the rate of a primary alcohol. How do you account for this?​

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.