Chemistry MCQs

Page No. 54

Which statement is incorrect about catalyst___________________?


ait is used in smaller amount


bdecrease activation energy


cspecific in action


dit affects specific rate constant



Energy of activation for backward reaction is less than forward reaction for ___________ reaction?


aEndothermic


bexothermic


cModerate


dFast


View Answer Endothermic

When the reaction completes in more than one steps rate of reaction will be determined by________________?


aFast step


bSlowest step


cAll steps


dMolecularity of the reaction


View Answer Slowest step

A substance which increases the reactivity of enzyme is called_________________?


aPromoters


bInhibitors


cStimulators


dNon-activators


View Answer Promoters

An enzyme has its specificity due to________________?


aSubstrate


bStructure


cTemperature


dPressure


View Answer Structure

Biocatalytical proteins are_________________?


aEnzymes


bSubstrate


cLipids


dany of above


View Answer Enzymes

When catalysts and reactants are in more than one phase it is________________?


aHomogeneous catalysis


bHeterogeneous catalysis


cCatalysis


dEa



Anything which increases rate of reaction without being involved in the reaction________________?


aPromoter


bCatalyst


cInhibitor


dAll of the above


View Answer Catalyst

Which of the following will have very high rate of reaction ?


aDouble decomposition reaction


bNeutralization reaction


cIonic reactions


dAll of the above


View Answer All of the above

Energy of reactant higher than energy of product favours?


aEndothermic


bExothermic


cModerate reaction


dNo reaction


View Answer Exothermic

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