MDCAT Chemistry Past Papers 2024Sindh MDCAT Chemistry Past Paper 2024#Chemistry of Hydrocarbons#Natural Gas in Pakistan166Choose the best answerThe initial discovery of natural gas in Pakistan dates back to when it was found in the Sui area of Baluchistan:A1955B1954C1956D1952 Like 0 Discuss 0Share
Chemistry of HydrocarbonsHalohydrin Formation167Choose the best answerWhich intermediate is formed during bromohydrin formation from an alkene?AFree carbocationBBromonium ionCCarbanionDFree radical Like 1 Discuss 0Share
Chemistry of HydrocarbonsFree-Radical Halogenation of Alkanes168Choose the best answerWhich reaction is a propagation step in the chlorination of methane?ACl₂ → 2Cl•BCH₄ + Cl• → CH₃• + HClCCl• + Cl• → Cl₂DCH₃• + CH₃• → C₂H₆ Like 1 Discuss 0Share
Chemistry of HydrocarbonsPreparation of Benzene from Phenol169Choose the best answerPhenol on heating with zinc dust gives:ACyclohexaneBBenzeneCTolueneDChlorobenzene Like 0 Discuss 0Share
Chemistry of HydrocarbonsDirective Influence of Substituents170Choose the best answerWhich is the strongest ortho-para directing group among the following?A–OHB–ClC–C₆H₅D–Br Like 0 Discuss 0Share