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NTA Abhyas NEET2020ChemistryChemical KineticsPractice

Which of the following is correct for zero and first order reactions respectively, where 'a' is initial concentration of the reactant?

Options

  1. At 1 / 2 ∝ a , t 1 / 2 ∝ 1 a 2
  2. Bt 1 / 2 ∝ a , t 1 / 2 ∝ 1 a
  3. Ct 1/2 ∝ a,   t 1/2 ∝ a 0
  4. Dt 1 / 2 ∝ a 0 , t 1 / 2 ∝ a

Correct answer

C. t 1/2 ∝ a,   t 1/2 ∝ a 0

Step-by-step solution

t 1 / 2 ∝ 1 a n - 1 where n = order of reaction for zero order, t 1 / 2 ∝ a for first order, t 1 / 2 ∝ a 0

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