UHS MDCAT 2025 Chemistryuhs mdcat chemistry 2025#Chemistry of Hydrocarbons#Pi Bond in Alkenes16Choose the best answerIn propene π-bond is formed by sideway overlap of:As-orbitalsBp-orbitalsCsp³ hybrid orbitalsDsp² hybrid orbitals Like 0 Discuss 0Share
Chemistry of HydrocarbonsKolbe's Electrolysis17Choose the best answerKolbe's electrolysis is carried out using an aqueous solution of:AAlcoholsBSodium or potassium salts of carboxylic acidsCAldehydesDKetones Like 0 Discuss 0Share
UHS MDCAT 2023 ChemistryUHS MDCAT 2023 Past Paper#Chemistry of Hydrocarbons#Hydration of Alkynes18Choose the best answerPropanone can be prepared from propyne by: (UHS MDCAT 2023)APassing a mixture of propyne and steam over a catalyst, magnesium at 420°CBPassing a mixture of propyne and ethanol over a catalyst, zinc chromateCBoiling propyne with water in the presence of HgSO₄ and H₂SO₄DTreating propyne with iodine and NaOH Like 1 Discuss 0Share
Chemistry of HydrocarbonsHalogenation of Benzene19Choose the best answerIn the simplified electrophilic-substitution model, the attacking electrophile in chlorination is represented as:ACl⁺BCl⁻CCl₂⁻DHCl Like 0 Discuss 0Share
Chemistry of HydrocarbonsPreparation of Alkanes by Hydrogenation20Choose the best answerComplete hydrogenation of one mole of an alkyne to an alkane requires:AOne mole of H₂BTwo moles of H₂CThree moles of H₂DNo H₂ Like 0 Discuss 0Share