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J & K CET Medical J & K - CET Medical Solved Paper-2001

  • question_answer
    Doubling the concentration of A in the reaction\[A\to B\]increases the rate of formation of B by a factor of 4. The order of reaction kinetics is:

    A)  0                                            

    B)  1

    C)  2                                            

    D)  3

    Correct Answer: C

    Solution :

                    Let the order of the reaction is n. \[{{r}_{1}}=k{{[A]}^{n}}\] \[{{r}_{2}}=k{{[2A]}^{n}}\] \[\because \]     \[\frac{{{r}_{2}}}{{{r}_{1}}}=\frac{{{[2A]}^{n}}}{{{[A]}^{n}}}\]                 \[4=\frac{{{[2A]}^{n}}}{{{[A]}^{n}}}\]                 \[{{2}^{2}}={{2}^{n}}\] \[n=2\]


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