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NEET Sample Paper NEET Sample Test Paper-43

  • question_answer
    The rate of a reaction gets doubled when the temperature changes from \[7{}^\circ C\]to\[17{}^\circ C\]. By what factor will it change for the temperature change from \[17{}^\circ C\]to\[27{}^\circ C\]:

    A) 1.81                 

    B) 1.71

    C) 1.91                 

    D) 1.76

    Correct Answer: C

    Solution :

    \[2.303\,\log \,\frac{{{K}_{2}}}{{{K}_{1}}}=\frac{{{E}_{A}}}{R}\,\left[ \frac{{{T}_{2}}-{{T}_{1}}}{{{T}_{1}}{{T}_{2}}} \right];\] \[T=280\,K;\,T=290K;\frac{{{K}_{2}}}{{{K}_{1}}}=2\] Find \[{{E}_{a}}\] and then again use: \[2.303\,\,\log \,\frac{K{{'}_{2}}}{K{{'}_{1}}}=\frac{{{E}_{A}}}{R}\left[ \frac{T{{'}_{2}}-T}{{{T}_{1}}'T{{'}_{2}}} \right]\] If  \[{{T}_{1}}'=290\,K;\,{{T}_{2}}'=300\,K;\]


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