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  3. Chemistry
  4. The first order reaction is carried out starting with 10 mol L-1 of the reactant. It is 40 % complete in one hour. If the same reaction is carried out with an initial concentration of 5 mol L-1, the percentage of the reaction that is completed in one hour will be

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Q. The first order reaction is carried out starting with $10\, mol\, L^{-1}$ of the reactant. It is $40\%$ complete in one hour. If the same reaction is carried out with an initial concentration of $5 \,mol\, L^{-1}$, the percentage of the reaction that is completed in one hour will be

JIPMERJIPMER 2014Chemical Kinetics

Solution:

For a first order reaction, time taken for a definite fraction to complete is independent of initial concentration. In other words, in same time, same % age of reaction will be completed.