Chemistry of HydrocarbonsPreparation of Alkynes by Double Dehydrohalogenation66Choose 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#Electrochemistry#Electrolysis67Choose the best answerQ.92 In Castner Kellner cell:ANaOH + H₂ are produced at cathodeBCl₂ is produced at anodeCNaOH + H₂ are produced at anodeDNaOH + H₂ are produced at cathode & Cl₂ is produced at anode Like 0 Discuss 0Share
StoichiometryMole Concept and Number of Molecules68Choose the best answerWhich sample contains the greatest number of molecules?A2 mol H₂B4 mol CH₄C6 mol SO₂D10 mol O₂ Like 0 Discuss 0Share
Alcohols and PhenolsPreparation of Alcohols by Hydration of Alkenes69Choose the best answerAcid-catalysed hydration of an unsymmetrical alkene generally follows:AAnti-Markovnikov's ruleBMarkovnikov's ruleCSaytzeff's ruleDHofmann's rule Like 0 Discuss 0Share
KMU MDCAT 2024 Chemistry#Passivation#S- and P-Block Elements70Choose the best answerThird period element that initially reacts rapidly with oxygen to form a protective oxide coating that prevents further reactions is (KMU MDCAT 2024)AAlBMgCNaDSi Like 0 Discuss 0Share