Chemistry MCQs

Page No. 54

Which statement is incorrect about catalyst___________________?


ait is used in smaller amount

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bdecrease activation energy

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cspecific in action

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dit affects specific rate constant

✓



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


aEndothermic

✓


bexothermic

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cModerate

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dFast

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View Answer Endothermic

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


aFast step

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bSlowest step

✓


cAll steps

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dMolecularity of the reaction

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View Answer Slowest step

A substance which increases the reactivity of enzyme is called_________________?


aPromoters

✓


bInhibitors

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cStimulators

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dNon-activators

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View Answer Promoters

An enzyme has its specificity due to________________?


aSubstrate

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bStructure

✓


cTemperature

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dPressure

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View Answer Structure

Biocatalytical proteins are_________________?


aEnzymes

✓


bSubstrate

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cLipids

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dany of above

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View Answer Enzymes

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


aHomogeneous catalysis

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bHeterogeneous catalysis

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cCatalysis

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dEa

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


aPromoter

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bCatalyst

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cInhibitor

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dAll of the above

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View Answer Catalyst

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


aDouble decomposition reaction

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bNeutralization reaction

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cIonic reactions

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dAll of the above

✓


View Answer All of the above

Energy of reactant higher than energy of product favours?


aEndothermic

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bExothermic

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cModerate reaction

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dNo reaction

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View Answer Exothermic

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