UHS MDCAT 2023 ChemistryUHS MDCAT 2023 Past Paper#Alkynes#Chemistry of Hydrocarbons61Choose the best answerWhich reagent can distinguish 1-pentyne from 2-pentyne?AAgNO₃ + NH₄OHB1% alkaline dilute KMnO₄CBr₂/CCl₄DK₂Cr₂O₇ + H₂SO₄ Like 0 Discuss 0Share
Chemistry of HydrocarbonsOxidative Cleavage of Alkynes62Choose the best answerPropyne, CH₃C≡CH, on oxidative ozonolysis gives:AEthanoic acid and CO₂BEthanoic acid and methanoic acid onlyCEthanoic acid and methanolDTwo molecules of ethanoic acid Like 1 Discuss 0Share
Chemistry of HydrocarbonsStructure and Hybridization of Alkanes63Choose the best answerThe C–C bond in ethane is formed by overlap of:Asp³–sp³ orbitalsBsp²–sp² orbitalsCsp–sp orbitalsDp–p orbitals Like 1 Discuss 0Share
UHS MDCAT 2023 ChemistryUHS MDCAT 2023 Past Paper#Addition Reactions#Chemistry of Hydrocarbons64Choose the best answerWhat is formed when HBr adds to 2-butene?A1-bromobutaneB2-bromobutaneC1,3-dibromobutaneD2,3-dibromobutane Like 0 Discuss 0Share
Chemistry of HydrocarbonsMechanism of Electrophilic Aromatic Substitution65Choose the best answerThe intermediate formed after electrophilic attack on benzene is called:ACarbanionBArenium ion or σ-complexCFree radicalDAcetylide ion Like 1 Discuss 0Share