MDCAT Chemistry Past PapersIBA MDCAT Chemistry Paper Reconduct 2024#Chemistry of Hydrocarbons#Pi Bond in Alkenes21Choose the best answerIn ethene, how many unhybridized p orbitals overlap to form π bonds? (IBA MDCAT Reconduct 2024)A1B2C4D8 Like 0 Discuss 0Share
Chemistry of HydrocarbonsOzonolysis of Alkenes22Choose the best answerReductive ozonolysis of 2-methylpropene gives:ATwo molecules of methanalBPropanone and methanalCTwo molecules of propanoneDEthanal and methanal Like 0 Discuss 0Share
Chemistry of HydrocarbonsPreparation of Alkynes by Double Dehydrohalogenation23Choose the best answerAlkynes are commonly prepared by double dehydrohalogenation of:AGeminal or vicinal dihalidesBAlcohols onlyCAldehydes onlyDCarboxylic acids Like 0 Discuss 0Share
Sindh MDCAT 2022 Chemistry#Chemistry of Hydrocarbons#Wurtz Reaction24Choose the best answerQ.81 2-chloropropane is heated with Na metal, product is 2,3-dimethylbutane. Reaction is:ADehydrohalogenationBWurtz reactionCDehydrationDCatalytic dehydrogenation Like 0 Discuss 0Share
Chemistry of HydrocarbonsFree-Radical Halogenation of Alkanes25Choose the best answerFree-radical substitution of an alkane with chlorine is initiated by:AHeat or UV lightBDilute HClCConcentrated H₂SO₄DKMnO₄ Like 0 Discuss 0Share