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Free Online Mock Chemistry Multiple Choice Test on Chemical Kinetics
Sub Category : Chemical Kinetics Test : 9 Time Left :
1) In the accompanied diagram, ER, EP and EX represent the energy of the reactants, products and activated complex respectively. Which of the following is the activation energy for the backward reaction?(1)A (2)B (3)C (4)D
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2) If Ef and Eb are the activated energies of the forward and reverse reactions and the reaction is known to be exothermic, then (1)Ef Less than Eb (2)Ef Greater than Eb (3)Ef = Eb (4) Data insufficient to predict.
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3)The large increase in the rate of the reaction due to rise in temperature is due to
(1) increase in collision frequency (2) lowering of activation energy (3) increase in the number of effective collisions (4) none is correct.
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4) The activation energy for a hypothetical reaction A->X is 12.49 k cal mol-1. If temperature is raised to 305 K from 295 K. The reaction rate increases by R=0.002 k cal K-1 mol-1 (1)Almost equal to 60% (2)Almost equal to 50% (3)Almost equal to 100% (4) unpredictable.
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5) The plot of log k vs 1/T helps to calculate (1) Energy of activation (2) Rate constant of the reaction (3) Order of the reaction (4) Energy of activation as well as the frequency factor.
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