Chemical Kinetics · JEE Main previous year questions

2012 2 questions

1. Q752012 · 26 May 2012 · Shift 1

   The activation energy for a reaction which doubles the rate when the temperature is raised from 298 K to 308 K is

   1. A.$59.2\mathrm{kJ}\mathrm{mo}{\mathrm{l}}^{-1}$
   2. B.$39.2\mathrm{kJ}\mathrm{mo}{\mathrm{l}}^{-1}$
   3. C.$52.9\mathrm{kJ}\mathrm{mo}{\mathrm{l}}^{-1}$
   4. D.$29.5\mathrm{kJ}\mathrm{mo}{\mathrm{l}}^{-1}$
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   Answer: C

2. Q762012 · 12 May 2012 · Shift 1

   In a chemical reaction $A$ is converted into $B$. The rates of reaction, starting with initial concentrations of $A$ as $2\times 10^{-3}\mathrm{M}$ and $1\times 10^{-3}\mathrm{M}$, are equal to $2.40\times 10^{-4}\mathrm{M}{\mathrm{s}}^{-1}$ and $0.60\times 10^{-4}\mathrm{M}{\mathrm{s}}^{-1}$ respectively. The order of reaction with respect to reactant $A$ will be

   1. A.0
   2. B.1.5
   3. C.1
   4. D.2
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   Answer: D