MDCAT Chemistry Past Papers 2024Sindh MDCAT Chemistry Past Paper 2024#Alkenes#Chemistry of Hydrocarbons106Choose the best answerWhen an unsymmetrical alkene undergoes addition reactions, the negative part of attacking reagent is added to that double-bonded carbon atom which contains:AHighest number of chloride atomsBLesser number of hydrogen atomsCHighest number of hydrogen atomsDModerate number of hydrogen atoms Like 0 Discuss 0Share
Chemistry of HydrocarbonsPartial Reduction of Alkynes107Choose the best answerWhich reagent converts an alkyne mainly into a trans-alkene?AH₂/PdBH₂/Lindlar catalystCNa/NH₃(l)DH₂/Ni Like 0 Discuss 0Share
Chemistry of HydrocarbonsPartial Reduction of Alkynes108Choose the best answer2-Butyne treated with Na/NH₃(l) gives:Acis-2-ButeneBtrans-2-ButeneCButaneD1-Butene Like 0 Discuss 0Share
Chemistry of HydrocarbonsActivating and Deactivating Groups109Choose the best answerThe decreasing order of activating effect is:A–NH₂ > –OH > –CH₃B–CH₃ > –OH > –NH₂C–OH > –NH₂ > –CH₃D–CH₃ > –NH₂ > –OH Like 0 Discuss 0Share
Chemistry of HydrocarbonsHistorical Structures of Benzene110Choose the best answerThe centric representation of benzene is historically associated with:ADewarBLadenburgCKekuléDArmstrong and Baeyer Like 0 Discuss 0Share