UHS MDCAT 2025 Chemistryuhs mdcat chemistry 2025#Chemical Kinetics#Rate Law1716Choose the best answer2A + B → 3C + D which of the following does not express the reaction rate?A-d[B]/dtBd[D]/dtC-½ d[A]/dtD-⅓ d[C]/dt Like 1 Discuss 0Share
Chemical equilibrium 01Chemical equilibrium #Kc1717Choose the best answerFor a reversible reaction, what happens when Qc < Kc?AShift in the forward directionBShift in the reverse directionCRemain unchangedDStop both reactions Like 0 Discuss 0Share
GasesAbsolute Zero1718Choose the best answerThe temperature corresponding to zero on the absolute temperature scale is called:ACritical temperatureBAbsolute zeroCBoiling pointDStandard temperature Like 0 Discuss 0Share
Classification of Hydrocarbons and IsomerismClassification of hydrocarbons, structural & geometrical isomerism#Isomerism#Structural Isomerism1719Choose the best answerWhich pair does NOT represent isomerism?AEthanol and dimethyl etherBPropanal and propanoneCPropan-1-ol and ethanolDButane and 2-methylpropane Like 0 Discuss 0Share
Chemical KineticsEffect of Catalyst on Activation Energy1720Choose the best answerA reaction is catalysed by X. The primary kinetic effect of X is that it:ADecreases the rate constantBIncreases the equilibrium constantCDecreases the enthalpy changeDLowers the activation energy Like 0 Discuss 0Share