Chemical KineticsEnergy Profile and Enthalpy Change16Choose the best answerIn an energy profile, the energy of products is E₂ and the energy of reactants is E₃. Which relation is correct?AA catalyst changes ΔH.BA catalyst changes the energies of reactants and products.CΔH = E₂ − E₃DA catalyst converts an endothermic reaction into an exothermic reaction. Like 0 Discuss 0Share
Sindh MDCAT 2020 Chemistry#Chemical Kinetics#Rate Law17Choose the best answerFor which of the following order of the reaction, rate of reaction is inversely proportional to the concentration of reaction? (Sindh MDCAT 2020)A1st order reactionB2nd order reactionCNegative order of reactionDZero order of reaction Like 0 Discuss 0Share
Chemical equilibrium 01Chemical equilibrium #Chemical Kinetics#Reverse Reaction Rate18Choose the best answerWhich symbol denotes the rate of the reverse reaction?ARfBRrCkfDKc Like 0 Discuss 0Share
Chemical KineticsMolecularity of Elementary Reactions19Choose the best answerAn elementary reaction involving two different reactant species:ACan never be second orderBCannot be unimolecularCCannot be bimolecularDCannot have a rate law Like 0 Discuss 0Share
Chemical kinetics #Molecularity20Choose the best answerWhich statement correctly describes molecularity?AIt can be zeroBIt may be fractionalCIt is defined only for an elementary reactionDIt is obtained from the overall rate law Like 0 Discuss 0Share