Chemical Kinetics · JEE Main previous year questions

2017 2 questions

1. Q672017 · 9 Apr 2017 · Shift 1

   The rate of a reaction quadruples when the temperature changes from 300 to 310 K. The activation energy of this reaction is : (Assume activation energy and preexponential factor are independent of temperature; $\ln 2=0.693$; $\mathrm{R}=8.314\mathrm{J}\mathrm{mo}{\mathrm{l}}^{-1}{\mathrm{K}}^{-1}$)

   1. A.$107.2\mathrm{kJ}\mathrm{mo}{\mathrm{l}}^{-1}$
   2. B.$53.6\mathrm{kJ}\mathrm{mo}{\mathrm{l}}^{-1}$
   3. C.$26.8\mathrm{kJ}\mathrm{mo}{\mathrm{l}}^{-1}$
   4. D.$214.4\mathrm{kJ}\mathrm{mo}{\mathrm{l}}^{-1}$
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   Answer: A

2. Q672017 · 8 Apr 2017 · Shift 1

   The rate of a reaction A doubles on increasing the temperature from 300 to 310 K. By how much, the temperature of reaction B should be Increased from 300 K so that rate doubles if activation energy of the reaction B is twice to that of reaction A.

   1. A.9.84 K
   2. B.4.92 K
   3. C.2.45 K
   4. D.19.67 K
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   Answer: B