In a first order reaction, the time required to reduce the concentration of reactant from 1 mole/litre to 0.5 mole/litre will be ______________ that required to reduce it from 10 moles/litre to 5 moles/litre in the same volume ?
Correct answer: C. Same as
- A. More than
- B. Less than
- C. Same as
- D. Data insufficient; can't be predicted
Explanation
A first-order reaction has a constant half-life, t₁/₂ = ln 2/k, independent of the starting concentration. Both concentration changes are halvings, so their required times are the same.
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