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BITSAT2016ChemistryChemical KineticsActual

In the reaction, P + Q ? R + S The time taken for 75 % reaction of P is twice the time taken for 50 % reaction of P . The concentration of Q varies with reaction time as shown in the figure. The overall order of the reaction is

Options

  1. A2
  2. B3
  3. C0
  4. D1

Correct answer

D. 1

Step-by-step solution

For P , if t _ 50 % = x then t _ 75 % =2 x This is true only for first order reaction. So, order with respect to P is 1 . Further the graph shows that concentration of Q decreases with time. So rate, with respect to Q , remains constant. Hence, it is zero order wrt Q. So, overall order is 1+0=1

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