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NEET Chemistry Chemical Kinetics / रासायनिक बलगतिकी Question Bank Self Evaluation Test - Chemical Kinetics

  • question_answer
    For a certain reaction, rate\[=k\times {{\left[ {{H}^{+}} \right]}^{n}}\]. If pH of reaction changes from two to one, the rate becomes 100 times of its value at pH = 2, the order of reaction is-

    A) 1                                 

    B) 2    

    C) 0                                 

    D) 3

    Correct Answer: B

    Solution :

    [b] \[pH=2\,;{{r}_{1}}=k\times {{({{10}^{-2}})}^{n}}\,\{Q[{{H}^{+}}]={{10}^{-pH}}\}\] \[pH=1;{{r}_{2}}=k\times {{({{10}^{-1}})}^{n}}\] Given \[{{r}_{2}}=100\text{ }{{r}_{1}}\] \[\Rightarrow {{\left( \frac{{{10}^{-1}}}{{{10}^{-2}}} \right)}^{n}}=100\] \[{{10}^{n}}=100\] \[\therefore n=2\]


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