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NEET AIPMT SOLVED PAPER SCREENING 2005

  • question_answer
                    The rate of reaction between two reactants A and B decreases by a factor of 4, if die concentration of reactant B is doubled. The order of this reaction with respect to reactant B is:                      

    A)                 -1                           

    B)                 -2                           

    C)                 1            

    D)                 2

    Correct Answer: B

    Solution :

                    \[A+B\xrightarrow[{}]{{}}\Pr oduct\]                 \[Rate\,\propto \,\,[A]\,{{[B]}^{-2}}....(i)\]                 The rate decreases by factor 4 if the concentration of reactant ?B? is doubled                 So Rate \[\propto \,\,\,[A]\,{{[2B]}^{-2}}\]                 \[\propto \,\,\,\frac{[A]\,{{[B]}^{-2}}}{4}....(ii)\]                 Hence, order of reaction w.r.t. reactant B is -2.


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