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Half life period of first order reaction `A rarr` product is 6.93 h what is the value of rate constant ?A. 1.596 `h^(-1)`B. 0.1`h^(-1)`C. 4.802 `h^(-1)`D. 10 `h^(-1)`

Answer» Correct Answer - b
We have the formula for half life of a first order reaction
`t_(1//2)=(0.693)/(k)`
where k= rate constant
`therefore 6.93 h=(0.693)/(k) rarr k=(0.693)/(6.93h)`
`k=0.1 h^(-1)`


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