Chemistry of HydrocarbonsPhysical Properties of Hydrocarbons91Choose the best answerWhich statement best describes the physical state of higher members of a hydrocarbon homologous series?AThey remain gases regardless of chain length.BIncreasing molecular size can eventually change members from gases to liquids and then solids.CAll C₁₆ hydrocarbons must be solids.DMolecular structure has no effect on physical state. Like 0 Discuss 0Share
Chemistry of HydrocarbonsSulphonation of Benzene92Choose the best answerIn the usual textbook treatment, the electrophilic species in sulphonation of benzene is:ASO₃BSO₄²⁻CHSO₄⁻DOH⁻ Like 0 Discuss 0Share
Chemistry of HydrocarbonsOrientation in Electrophilic Aromatic Substitution93Choose the best answerWhich group is meta-directing?A–OHB–NH₂C–NO₂D–OCH₃ Like 0 Discuss 0Share
Chemistry of HydrocarbonsFriedel–Crafts Alkylation94Choose the best answerFriedel–Crafts alkylation of benzene can be carried out using:AC₆H₆ + CH₃Cl + AlCl₃BC₆H₆ + CH₄CC₆H₆ + NH₃DC₆H₆ + CH₃COCl without distinguishing acylation Like 0 Discuss 0Share
Chemistry of HydrocarbonsActivating and Deactivating Groups95Choose the best answerWhich order best represents the overall activating or electron-donating effect of these substituents on a benzene ring?A–NH₂ > –OH > –CH₃ > H > –Cl > –NO₂B–NO₂ > –Cl > H > –CH₃ > –OH > –NH₂CH > –CH₃ > –OH > –NH₂ > –Cl > –NO₂D–OH > –NH₂ > –CH₃ > H > –NO₂ > –Cl Like 0 Discuss 0Share