Chemistry of HydrocarbonsProperties of Benzene51Choose the best answerWhich is NOT a characteristic property of benzene?APlanar structureBAromaticityCEqual C–C bond lengthsDEasy oxidation by cold dilute KMnO₄ Like 2 Discuss 0Share
Chemistry of HydrocarbonsPhysical Properties of Hydrocarbons52Choose the best answerWhy does the boiling point generally increase as –CH₂– units are added to a homologous series of hydrocarbons?AHydrogen bonding increases.BMolecular size, surface area and dispersion forces increase.CIonic bonds begin to form.DThe molecules acquire permanent ionic charges. Like 0 Discuss 0Share
Chemistry of HydrocarbonsFree-Radical Halogenation of Alkanes53Choose the best answerWhich step regenerates Cl• and therefore propagates the chlorination chain?ACl₂ → 2Cl•BCH₃• + Cl₂ → CH₃Cl + Cl•CCH₃• + CH₃• → C₂H₆DCl• + Cl• → Cl₂ Like 1 Discuss 0Share
Chemistry of HydrocarbonsFriedel–Crafts Alkylation54Choose the best answerFriedel–Crafts acylation is often preferred over direct alkylation because alkylation may:AAlways produce a poisonous gasBRelease exceptionally large heat onlyCProduce polyalkylated productsDBe impossible with AlCl₃ Like 1 Discuss 0Share
Chemistry of HydrocarbonsHybridization in Alkenes55Choose the best answerIn propene, CH₂=CH–CH₃, the hybridization of the carbon atoms from left to right is:Asp², sp², sp³Bsp, sp², sp³Csp³, sp², sp²Dsp², sp³, sp³ Like 0 Discuss 0Share