Chemistry MCQs

Page No. 53

Energy required to form transition state is called _________________?


aEa


bP.E


cV


dK.E


View Answer Ea

Activated complex is formed due to________________?


apressure


bEffective collision


cIneffective collision


dTemperature


View Answer Effective collision

Which order of reaction obeys the relation t1/2 = 1/Ka____________________?


aFirst order


bSecond order


cThird order


dZero order


View Answer Second order

Rate of reaction when concentration of reactants are taken as unity is called_________________?


aArrhenius constant


bMolecularity


cSpecific rate constant


dIdeal rate constant



When a graph is plotted between 1/T on X-axis and log k on y-axis a straight line is obtained with a negative slope which has two end in__________________?


aI and II quadrant


bII and III quadrant


cIII and IV quadrant


dII and IV quadrant


View Answer II and IV quadrant

In rate expression the concentration of reactants is negative. It shows_______________?


aConcentration of reactant does not change


bConcentration of product increases


cConcentration of reactant decreases


dConcentration of reactant increases



Sum of exponents of molar concentration is called___________________?


aOrder of reaction


bMolecularity


cRate of reaction


dAverage of reaction


View Answer Order of reaction

On increasing the temperature the rate of reaction increases mainly because_________________?


aThe activation energy of the reaction increases


bConcentration of the reacting molecules increases


cCollision frequency increases


dNone of these



The addition of a catalyst to the reaction system__________________?


aIncreases the rate of forward reaction only


bIncreases the rate of reverse reaction


cIncreases the rate of forward but decreases the rate of backward reaction


dIncreases the rate of forward as well as backward reaction equally



Which of the following type of reaction is 3rd order reaction_________________?


a2N2O5 = 2N2O4 + O3


bNO + O3 ? NO2 + O2


cNO + O3 ? NO2 + O2


dNone of these


View Answer NO + O3 ? NO2 + O2

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