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NEETChemistryChemical Kinetics

Which of the following graphs represent a first order reaction (a= initial concentration of reactant, x= concentration of reactant consumed, t= time)?

Options

  1. A(i), (ii), (iv)
  2. B(iii), (iv)
  3. C(ii), (iii)
  4. D(i), (ii)

Correct answer

D. (i), (ii)

Step-by-step solution

For a first order reaction Rate =- [A] t =k[A] It is a straight line plot with negative slope when concentration of reactant is considered as in (i) and half-life for first order is independent from concentration, as in plot (ii).

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