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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

The reaction is: P + Q → R + S rate   of   the   reaction = k P x Q y The concentration of Q varies with time as per the graph by the equation. Q = Q 0 - kt ​ i.e. Zero-order kinetics. ⇒ y = 0 With respect to reactant P let time taken for 50 % completion of the reaction is a . Then the time is taken for 75 % complication will be 2 a . P → t 50 %   P 2 → t 75 %   P 4 at t = 0     ;   [ P ] 0 % =   P t =   t 50 %   ;   [ P ] 50

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