BUMHS MDCAT 2025 Chemistry#Catalytic Properties#Transition Elements21Choose the best answerReaction of toluene with chlorine in the presence of a Lewis acid catalyst gives the major product: (BUMHS MDCAT 2025)Ao-ChlorotolueneBm-ChlorotolueneCp-ChlorotolueneDEqual amounts of ortho and para products Like 0 Discuss 0Share30
UHS MDCAT 2024 Chemistry#Alloys#Transition Elements22Choose the best answerWhich of the following is NOT an Alloy?ASteelBBrassCBronzeDGraphite Like 0 Discuss 0Share
Sindh MDCAT 2020 Chemistry#Transition Elements#Variable Oxidation States23Choose the best answerThe transition element which does not show variable valency is: (Sindh MDCAT 2020)ACuBScCZnDCr Like 2 Discuss 0Share
SINDH MDCAT 2019 CHEMISTRY#Colour of Transition Compounds#Transition Elements24Choose the best answerThe colour of transition metal complexes is due to: (Sindh MDCAT 2019)Ad-d transition of electronsBParamagnetic nature of transition elementsCLoss of s-electronsDRefraction phenomenon Like 0 Discuss 0Share
Chemical kinetics #Catalytic Properties#Transition Elements25Choose the best answerWhy does a catalyst increase the rate of a chemical reaction?AIncreases the kinetic energy of reactant molecules.BDecreases the activation energy by providing an alternative pathway.CIncreases the enthalpy change (ΔH) of the reaction.DIncreases the equilibrium constant. Like 0 Discuss 0Share