6-8 use the unbalanced redox reaction fe(s) + mno. (aq) → fe low to answer questions 6-8 fe + mn(aq) (acid media) + mn2(aq) (acid 6. the oxidation state of manganese changes from a. 4 to 2 b. 7 to 2 c. o to 3 d. 7 to 0 e. 7 to 5 7. the oxidizing agent is agent is a. fe(s) b. mno4 (aq) c. fet d. mn* (aq) 8. when the equation is balanced the coefficient in front of water is a 2 b. 6 c. 7 d. 12 9. which of the following changes would not increase the production of products the reaction? note the reaction is exothermic. a. lower the ph b. make the iron electrode bigger c. add more kmno. d. cool the reaction

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.