Rate constant for a first order reaction does not depend upon reaction time, extent of reaction and the initial concentration of reactants; but it is a function of reaction temperature. In a chemical reaction, the time required to reduce the concentration of reactant from 100 gm moles/litre to 50 gm moles/litre is same as that required to reduce it from 2 gm moles/litre to 1 gm mole/litre in the same volume. Then the order of this reaction is ?
Correct answer: B. 1
- A. 0
- B. 1
- C. 2
- D. 3
Explanation
Equal times for reducing concentration by the same factor, from 100 to 50 and from 2 to 1, indicate a constant half-life. A constant half-life is characteristic of a first-order reaction.
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