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NTA Abhyas NEET2020ChemistryChemical KineticsPractice

Half-life of a reaction becomes half when initial concentration of reactants are made double. The order of reaction will be

Options

  1. A1
  2. B2
  3. C0
  4. D3

Correct answer

B. 2

Step-by-step solution

t 1 2 ∝ 1 C 0 o r d e r − 1 where C 0 =initial conc. Now as t 1 2 ∝ C 0 1 − o r d e r According to the question, half life becomes half on doubling concentration , i.e. , t 1 / 2 ∝ C 0 - 1 ∴ on comparing we get order = 2

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