Match the rate expressions in LIST-I for the decomposition of \(\mathrm{X}\) with the corresponding profiles…

Match the rate expressions in LIST-I for the decomposition of \(\mathrm{X}\) with the corresponding profiles provided in LIST-II. \(X_s\) and \(\mathrm{k}\) are constants having appropriate units.
  1. IP;IIQ;IIIS;IVT
  2. IR;IIS;IIIS;IVT
  3. IP;IIQ;IIIQ;IVR
  4. IR;IIS;IIIQ;IVR

Solution

I rate =kXXS+X

Case-1: X>>Xs;X+XsX

rate =kXX=k    (Zero order w.r.t. X)

IP,S

 

Case-2: XXs;X+XsXs

 rate =kXXS=k'X   (1st order w.r.t. X)

  IQ,T

Case-3: XXS

rate =kXXs+X

In this case curve-R given in List-II will match.

 IP,Q,R,S,T  (The graph of half-life should start from origin)

II rate =kXXS+X

 XXS

 Xs+XXs

  rate =kXXS=k'X  (1st order w.r.t. X)

 IIQ,T

III  rate =kXXs+X

 X>>Xs

 Xs+XX

  rate =kXX=k   (Zero order w.r.t. X)

  IIIP,S

IV rate =kX2Xs+X

 X>>XS

 XS+XX

  rate =kX2X=kX   (1st order w.r.t. X)

 IVQ,T

Asked in: JEE Advanced 2022 (Paper 1)

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