1.

The half-life period of a first order reaction is given by

Answer»

`t_(1//2)= 0.693/K`
`t_(1//2)= k/0.693`
`t_(1//2)= 2.303` In 2
`t_(1//2) = 2.303 (a/2)`

Solution :For a 1ST order REACTION, `t_(1//2) = (0.693)/(k)` .


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