1.

In a first order reaction ArarrBif k is rate constant and initial concentration of the reactant A is 0.5 M then the half - life is :

Answer»

`("LOG"2)/(k) `
`("log"2)/(ksqrt(0.5))`
`(In2)/(k)`
`(0.693)/(0.5 k)`

Solution :(C ) `t_(1//2) ` for a FIRST ORDER reaction is :
`t_(t//2) = (0.693)/(k) "or " = (In2)/(k)`


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