1.

Select and write the most appropriate answer from the given alternatives for each sub-question: The rate constant for a first order reaction is `100 S^(-1)`. The time required for completion of 50% of reaction is :A. 0.0693 millisecondB. 0.693 millisecondC. 6.93 millisecondD. 69.3 millisecond

Answer» Correct Answer - C
6.93 milliseconds
We known `t_(1//2)=0.693/k`
Here `k=100 s^(-1)`
`t_(1//2)=0.693/100=0.00693 s` or `6.93` millisecond.


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