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Chemical Kinetics
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Chemical Kinetics
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18 Questions

1. For an exothermic reaction - the energy ofactivation of the reactants is [1994]
2. A substance \'A\' decomposes by a first order reaction starting initially with [A] = 2.00 m and after 200 min - [A] becomes 0.15 m For this reaction t1/2 is [1995]
3. For a reaction between Aand B the orderwith respect to Ais 2 and the order with respectto B is 3The concentrations of both Aand Baredoubled - the rate will increase by a factor of:[2013]
4. If the rate of the reaction is equal to the rateconstant - the order of the reaction is [2003]
5. Which one of the following statements forthe order of a reaction is incorrect? [2011]
6. Activation energy of a chemical reaction canbe determined by [1998]
7. In a zero-order reaction for every 10° rise oftemperature - the rate is doubledIf thetemperature is increased from 10°C to 100°C - the rate of the reaction will become: [2012]
8. Half life of a first order reaction is 4 s and theinitial concentration of the reactants is 0.12 M.The concentration of the reactant left after 16 sis [1999]
9. In a reversible reaction the energy ofactivation of the forward reaction is 50 kcalTheenergy of activation for the reverse reaction willbe [1996]
10. Areaction is 50% completed in 2 hours and75% completed in 4 hoursThe order of reactionis [2013]
11. The rate of reaction depends upon the [1995]7The plot of concentration of the reactant vs.time for a reaction is a straight line with anegative slopeThe reaction follows a [1996
12. The rate of reaction between two reactantsAand Bdecreases by a factor of 4 if theconcentration of reactant Bis doubledThe orderof this reaction with respect to reactant Bis:[2005]
13. The unit of rate constant for a zero orderreaction is [2011]
14. Achemical reaction is catalyzed by a catalystXHence X [1995]
15. Half life period of a first-order reaction is1386 secondsThe specific rate constant of thereaction is: [2009]
16. If 60% of a first order reaction wascompleted in 60 minutes - 50% of the samereaction would be completed in aproximately(log 4 = 0.60 - log 5 = 0.69) [2007]
17. What is the activation energy for a reactionif its rate doubles when the temperature israised from 20°C to 35°C? (R= 8.314 Jmol -“1 K-“1)[2013]
18. When a biochemical reaction is carried out in laboratory in the absence of enzyme then rate of reaction obtained is 10-6 times - then activation energy of reaction in the presence of enzyme is [2001]

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