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JEE Main & Advanced Chemistry Chemical Kinetics / रासायनिक बलगतिकी Question Bank Rate law and Rate Constant

  • question_answer
    For a chemical reaction \[A\to B\] it is found that the rate of reaction doubles, when the concentration of A is increased four times. The order in A for this reaction is [NCERT 1979; AIIMS 1997; J & K CET 2005]

    A)                 Two      

    B)                 One

    C)                 Half

    D)                 Zero

    Correct Answer: C

    Solution :

               \[r=K{{[A]}^{m}}\] also \[2\,\text{r}=K{{[4A]}^{\,m}}\], \[\frac{1}{2}={{\left( \frac{1}{4} \right)}^{m}}\]                                 \[\therefore \,\,m=\frac{1}{2}\]


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