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`        (ii) The time for half life of first order reaction is 1 hr. What is time taken for  87.5% completion of the reaction.  `
2 years ago

Arun
23045 Points
```							Dear Student 87.5 % means three half livesAs 87.5 % 1st half life = 50%2nd half life = 50 + 50% (50) = 50 +25 = 75%3rd half life = 50 + 50 % (50) + 50% (25) = 87.5% Hence total time taken = 3 hours RegardsArun (askIITians forum expert)
```
2 years ago
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